Twitter has 10 million active users in Britain and 80 per cent of them access the service on mobile devices.
Twitter has 140 million users worldwide, with Britain the fourth biggest country for users after the US, Japan and Brazil. Globally, 55 per cent of users access Twitter from a mobile device, compared with 80 per cent in Britain.
The figures were released by Twitter to mark 12 months since the company opened its London office, which now has 30 staff.
Tony Wang, Twitter's UK general manager, said that the company wants to work more closely with politicians and policymakers.
He told the BBC that Twitter plans to hire a public policy manager to work with "the government, various ministries, members of Parliament as well as law enforcement".
Last summer, a series of events made Twitter the focus of attention among police, politicians and the media. More than 75,000 people identified footballer Ryan Giggs as the man involved in a legal case which was covered by a court injunction. Eventually, Mr Giggs was named in Parliament, but not before judges had complained about the threat services like Twitter pose to court cases.
