The biggest challenge to Theresa May's Brexit deal, appears to be coming from within her own party.

Several ministers have resigned and some MPs are pushing for May's resignation, over the draft agreement she's reached with the EU.

May has told a news conference she's standing by her deal, and won't stand down.

BBC diplomatic producer Stuart Hughes told Mike Hosking she now faces a challenge to stay in power, and get the deal through.

"It's possible that a no confidence vote could be held and it's possible that Theresa May will win it but any vote will be extremely bruising at what's a crucial time in the Brexit process."

LISTEN ABOVE AS STUART HUGHES SPEAKS WITH MIKE HOSKING