UK Home Secretary Theresa May says the Government expects the British death toll in the Tunisia beach attack to rise further.

Speaking to the BBC's Andrew Marr Show about the threat facing the UK, the Home Secretary said: "Yes, a number of plots have been stopped.

"Over the last ten years it's estimated that something like 40 plots have been disrupted here in the UK."

She said the security services have had to cope with a more "diverse" threat from extremists since the London bombings in 2005, including the possibility of lone wolf attacks.

The UK government had sent a medical liaison team to the coastal resort of Sousse to assist injured Britons, and was expanding a unit sent to examine security around similar tourist sites in Tunisia.

May said security warnings would remain constant for the time being. She said, however, that it could be difficult to prevent such future terror attacks.

The medical team would ensure injured Britons were being properly looked after and assist them in travelling back to the UK, May said. She added: "We've also dispatched a small team to Tunisia to look at protective security arrangements around tourist resorts and we’ve decided this morning to increase the numbers of that team, and they will be assessing any extra requirements in relation to security on the ground."