Police in London have arrested 12 people on suspicion of outraging public decency after climate change activists stripped off to stage a protest in the House of Commons while MPs debated Brexit.

A group of semi-naked Extinction Rebellion protesters with messages painted on their bodies stood up in the public gallery overlooking the debate.

Some were pressed against the glass that separates the gallery from the chamber.

Police who were sent to the scene to negotiate said one had "super-glued" themselves to the window.

MPs were seen taking a glance up at the protest.

Speaker John Bercow maintained that the debate on the second stage of the Brexit alternatives would proceed despite the protest.

The Metropolitan Police said: "12 arrests have been made for outraging public decency."