The Adjudicator's Office deals with complaints about HM Revenue & Customs, the Valuation Office Agency and the Insolvency Service. The site includes annual reports and information and guidance on the complaint procedure.

The European Ombudsman investigates complaints of maladministration by institutions and bodies of the European Union. The site includes general information, annual and special reports, the text of the European Code of Good Administrative Behaviour, all decisions 30 June 1998 onwards, and selected earlier decisions.

The Financial Ombudsman Service, created by the Financial Services and Markets Act (FSMA) 2000, settles disputes between businesses providing financial services and their customers. Its site includes details of the complaint process, annual reviews 1999/2000 onwards, a link to the FSMA 2000, and a link to the dispute resolution section of the Financial Conduct Authority Handbook (on the FCA site), under which it operates. There is a regular online newsletter Ombudsman News.

The Housing Ombudsman Service (HOS), formerly known as the Independent Housing Ombudsman, deals with complaints against landlords and agents, and other housing disputes. All social landlords (housing associations) registered in England are members of the scheme, together with certain private landlords and management agents. Site content includes factsheets, case studies, forms, and a directory of all HOS registered landlords.

The Independent Case Examiner investigates complaints made by service users of various government agencies and businesses including the Child Support Agency, the Northern Ireland Social Security Agency, Jobcentre Plus, the Pension, Disability and Carers Service, the Financial Assistance Scheme, Debt Management and Child Maintenance and Enforcement Division (Northern Ireland). The site provides information on the complaint procedure, forms, and annual reports 2000/2001 onwards.

The Independent Complaints Adjudication Service for Ofsted (ICASO) provides a review service for complainants who remain dissatisfied after exhausting the internal complaints procedures of Ofsted (the Office for Standards in Education, Children's Services and Skills). The web site includes information about the process and how to apply, and annual reports 2011 onwards.

The Independent Complaints Reviewer (ICR) investigates customers' complaints about the Land Registry, the National Archives, the Northern Ireland Youth Justice Agency and the Children's Commissioner for Wales. The site has general information and contact details, and annual reports for each of the individual bodies from 2001 or 2001/02 onwards.

The Independent Police Complaints Commission (IPCC) has been responsible for the investigation of complaints and allegations of misconduct against the police in England and Wales since 1 April 2004, when it replaced the Police Complaints Authority. The IPCC's web site includes information on the role of the Commission, press releases, consultation papers, annual reports, investigation reports, and links to relevant legislation.

The Judicial Appointments and Conduct Ombudsman investigates complaints about the judicial appointments process and the handling of matters involving judicial discipline or conduct. This section of the Justice portal site has a list of all judicial offices covered by the scheme, information on how to make a complaint, and recent annual reports.

The Lay Observer oversees the complaint-handling function of the Law Society of Northern Ireland. The site includes information on the Lay Observer's role, details of the complaints procedure, and recent annual reports.

The Legal Ombudsman scheme for handling complaints about providers of legal services in England and Wales came into operation on 6 October 2010. Site content includes the scheme rules, FAQs, news, consultations, guidance, annual reports, and topically arranged case summaries.

The Local Government Ombudsman investigates complaints of maladministration by local authorities and certain other bodies in England, including education admissions appeal panels and adult social care providers. The site includes guidance, a "Complaint Outcomes" section which includes all investigation reports published since 1 April 2005, a number of special reports on the handling of complaints in particular subject areas, recent annual reports, and other publications.

The Northern Ireland Judicial Appointments Ombudsman was established on 25 September 2006 under the Constitutional Reform Act 2005 to investigate allegations by applicants for judicial appointments of maladministration or unfairness on the part of the Northern Ireland Judicial Appointments Commission, the Northern Ireland Courts and Tribunals Service or the Lord Chancellor. The site provides details of the complaints procedure and annual reports.

The Northern Ireland Ombudsman combines the two offices of Assembly Ombudsman for Northern Ireland and Northern Ireland Commissioner for Complaints. The site has general information, guidance, forms, case digests and recent annual reports.

The Office for Judicial Complaints (OJC) was established on 3 April 2006 under the Constitutional Reform Act 2005. It handles complaints about the personal conduct of all judicial office holders in England and Wales and some judicial office holders who sit in tribunals in Scotland and Northern Ireland. Leaflets, annual reports and other publications are reproduced on the site, and there are links to relevant regulations.

The Complaints Commissioner was created to investigate complaints against the Financial Services Authority (FSA) under a scheme which came into operation on 3 September 2001. From 1 April 2013 it deals with complaints about the FSA's successors, the Prudential Regulation Authority (PRA), the Financial Conduct Authority (FCA), and (in certain specific respects) the Bank of England. Information on the site includes all annual reports to date, final reports on the Commissioner's investigations, and links to the FSA's responses to those reports on the FSA web site.

The Office of the Independent Adjudicator (OIA) has operated an independent complaints scheme for students in higher education in England and Wales since 2004, when it replaced the previous visitatorial system for higher education institutions. The site has the Rules of the scheme, forms, guidance both for students and for higher education institutions, recent decisions and annual reports.

Membership of the Ombudsman Association (formerly known as the British and Irish Ombudsman Association) is open to ombudsmen and other complaint-handling bodies within the UK, the British Crown Dependencies and Overseas Territories, and Ireland. The web site has a complete list of its 60+ members, with brief descriptions, contact details and links. Publications on the site include the most recent annual report and an occasional newsletter The Ombudsman.

The Ombudsman Service Limited provides independent dispute resolution for the communications, energy, property and copyright licensing sectors. Ombudsman Services: Communications deals with complaints from consumers about companies which provide communications services to the public; this includes phone and broadband companies. Site content includes a list of participating companies, information on the complaint procedure and contact details.

The Ombudsman Service Limited provides independent dispute resolution for the communications, energy, property and copyright licensing sectors. Ombudsman Services: Energy deals with disputes between customers and their energy supply companies relating to billing, transfer, service and sales issues. The site provides a list of participating companies, information on the complaints process, contact details and summaries of investigated cases.

The Ombudsman Service Limited provides independent dispute resolution for the communications, energy, property and copyright licensing sectors. Ombudsman Services: Property deals with complaints from consumers about chartered surveying firms, surveyors, estate agents, residential managing agents, letting agents and other property professionals. The site includes a list of participating companies, information relating to the complaints procedure and investigation process, contact details and summaries of investigated cases.

The Parliamentary Ombudsman and the Health Service Ombudsman (two separate posts, held by the same individual) investigate complaints about government departments and agencies and certain other public bodies in the UK, and the National Health Service in England. The site contains information on the complaint procedure, links to relevant legislation, and documents, including reports and press releases.

The office of Pension Protection Fund Ombudsman was established on 6 April 2005 to deal with disputes and appeals in relation to the Pension Protection Fund and the Financial Assistance Scheme. Site content includes guidance, forms and determinations.

The office of Pensions Ombudsman was established in 1991 to investigate and decide complaints and disputes about the way that occupational and personal pension schemes are run. The site has information, guidance, forms, annual reports and other publications. Determinations are available from 1995 onwards.

The Police Investigations and Review Commissioner (PIRC) is an independent public body which undertakes investigations into the most serious incidents involving the police and scrutinises the way police bodies operating in Scotland respond to complaints from the public. First established in 2007 as the Police Complaints Commissioner for Scotland (PCCS), it was renamed on 1 April 2013 upon the creation of the single Police Service of Scotland. Site content includes forms and leaflets, FAQs, details of the complaint review process, and downloadable texts of reviews 2007 onwards.

The Ombudsman's office provides an independent police complaints system under the Police (Northern Ireland) Acts 1998 and 2000. There are links to those Acts and to other relevant legislation. Publications include press releases, research reports and investigation reports. There is brief information, and where relevant the full text of judgments, on decisions of the Ombudsman which have been subjected to judicial review.

The Prisons and Probation Ombudsman investigates complaints from prisoners, those on probation, and those held in immigration removal centres. Since April 2004 the Ombudsman has also been responsible for investigating all deaths of prisoners and residents of probation hostels and immigration detention accommodation. Downloadable publications include fatal incident reports, special investigation reports, annual reports 1996-1997 onwards, and a newsletter On the Case.

The Property Ombudsman (TPO) (known before 1 May 2009 as the Ombudsman for Estate Agents) provides an independent service for dealing with disputes between member estate agencies and customers who are buying and selling residential property in the UK. The site has TPO's codes of practice for residential estate agents and for letting agents, summaries of recent cases, recent annual reports, and information and guidance on the complaint procedure.

The Public Services Ombudsman for Wales investigates complaints about public services in Wales, including local government, National Health Service organisations, the National Assembly for Wales, and many public bodies. The web site has information and guidance on the Ombudsman's role and the complaint procedure, annual reports, investigation reports, and an occasional Ombudsman's Casebook containing summaries of recent cases.

The Public Standards Commissioner is part of the Commission for Ethical Standards in Public Life in Scotland. The Commissioner is responsible for investigating complaints about councillors, members of devolved public bodies and Members of the Scottish Parliament who are alleged to have breached the code of conduct relating to the office they hold. Codes of conduct are available under "Links" on this site. Decisions on complaints are provided, 2003 onwards. Complaints form can be downloaded (and uploaded on completion).

This scheme provides the removals industry with an independent service to resolve disputes between member companies and their clients, if the normal complaints procedure has not produced a satisfactory conclusion. The site has information, contact details, a downloadable complaint form, and the latest annual report.

The Scottish Legal Complaints Commission (SLCC) was established on 1 October 2008, under the Legal Profession and Legal Aid (Scotland) Act 2007, to investigate complaints by members of the public about services provided by legal practitioners in Scotland. The site has information on the complaints process, the SLCC Rules, complaint forms, annual reports, news, and details of any current consultations.

Before 1 October 2008, when the new Scottish Legal Complaints Commission (SLCC) was established, complaints about the way the Law Society of Scotland or the Faculty of Advocates had handled a complaint against a legal practitioner were dealt with by the Scottish Legal Services Ombudsman (SLSO). Annual reports 2000-2001 to 2007-2008 are amongst material still accessible on the SLSO site: since the abolition of the SLSO most other content has been removed.

The Scottish Public Services Ombudsman (SPSO), established under the Scottish Public Services Ombudsman Act 2002, can investigate complaints made by members of the public against most public authorities in Scotland. Since 1 October 2010 this includes unresolved complaints about prisons, which prior to that date had been the responsibility of the former Scottish Prisons Complaints Commission (SPCC). There is advice for people wishing to complain, and for authorities complained against. The monthly Ombudsman's Commentary (see Our Findings>Investigations Reports) publishes outcomes of complaints.

The post of Service Complaints Commissioner for the Armed Forces was created by the Armed Forces Act 2006, following recommendations made by Nicholas Blake QC in the Deepcut Review. The site has information on the role of the Commissioner, details of the complaint procedure, a downloadable complaint form, and annual reports.

The Standards Commission for Scotland was established pursuant to the Ethical Standards in Public Life etc. (Scotland) Act 2000 to assure compliance with the Code of Conduct for Councillors and the Code of Conduct for Devolved Public Bodies. (Complaints of alleged breaches of a code are investigated in the first instance by the Public Standards Commissioner.) The "Codes & Acts" section of the web site contains both of the codes. Rules for the conduct of hearings are published on the web site, as are full-text decisions, 2007 onwards and annual reports, 2003/04 onwards.

Standards for England was the operating name for the Standards Board for England, a non-departmental public body which was responsible until 31 January 2012 for promoting ethical standards amongst elected and co-opted members of local authorities. The Board was formally wound up on 31 March 2012 but its archived web site remains accessible here on the National Archives site.

The Waterways Ombudsman considers complaints and disputes about Canal & River Trust (from 2 July 2012) and its predecessor British Waterways (until 1 July 2012). The site has general information and contact details, the current Rules of the Waterways Ombudsman Scheme, and the Ombudsman's annual report 2005-06 onwards, in which summaries of decisions are published.