Department for Work and Pensions

Responsible for Government's welfare reform agenda - website provides support and advice on various benefits and services including pensions 
www.dwp.gov.uk/

Directgov

Up-to-date information on pensions and retirement planning issues 

https://www.gov.uk/browse/working/workplace-personal-pensions

Financial Conduct Authority

Independent body that regulates UK financial services industry

www.fca.org.uk

HM Revenue & Customs

Provides information on tax and National Insurance contributions (NICs) 
www.hmrc.gov.uk/home.htm

HM Treasury

Provides information on changes in legislation and Government regulations, including Budget reports 
www.hm-treasury.gov.uk/

IFA Promotion

Provides details of Independent Financial Advisers in the UK 
www.unbiased.co.uk

Money Helper

Is a service established by the UK Government to provide pensions guidance

https://www.moneyhelper.org.uk/en/pensions-and-retirement

The Pensions Regulator

The regulatory body for work-based pension schemes in the UK
www.thepensionsregulator.gov.uk/

The Pension Tracing Service

Helps you to find any pension schemes you have lost touch with 
www.direct.gov.uk/en/Pensionsandretirementplanning/Companyandpersonalpensions/DG_10027189

Shell Pensioners Association

SPA is open to anyone in the UK who is receiving a pension from Shell or is a deferred pensioner.
https://shellpensioners.org.uk/

State Pension Forecast

Find out how much pension you will receive from the State
www.direct.gov.uk/en/Pensionsandretirementplanning/StatePension/StatePensionforecast/DG_10014008

The Unclaimed Assets Register

A search service that helps you find your lost assets and re-establish contact with financial institutions  
www.uar.co.uk