Police in England are investigating an allegation that a Tory MP's aide raped a woman in the British Houses of Parliament.

Ukip MP Douglas Carswell has risked the wrath of his party leader by branding the comments made by Nigel Farage about immigrants coming to Britain for free treatment for HIV as “plain wrong”.

Nigel Farage has become a “snarling, thin-skinned, aggressive” man who is turning Ukip into a “personality cult”, the party’s campaign chief has said in a stunning attack on his leader.

Nigel Farage has vowed to quit as Ukip leader if he fails to become an MP at the UK's general election, declaring it would be “curtains for me”.