The Prime Minister's website, with a chance to put your views, consultations, history, copies of speeches and other fun things. Twitter @DowningStreet @cabinetoffice
The gateway to e-Government services in the UK. Twitter: @Directgov
Responsible for data protection and freedom of information also deals with complaints about unsolicited commercial e-mail (spam) and unsolicited text messages to mobile phones (if sent by UK-based companies).
An excellent source of statistics on a surprising range of subjects.
The UK Government’s Oil & Gas Authority is based in Aberdeen.