World Bulletin / News Desk

British Prime Minister Theresa May sought to refresh her government with a ministerial reshuffle Monday as she faces a crucial year for Brexit, but the shake-up began with a humiliating blunder.

It was an inauspicious start to a process described as a "refresh" by Downing Street following a tough year in which the prime minister lost her parliamentary majority and faced calls to quit.

After striking an interim Brexit deal with the European Union in December however, May begins 2018 in a stronger position.

The most senior foreign, finance and Brexit ministers were expected to keep their jobs, but others were due to move in a reshuffle prompted by the sacking of May's deputy last month.

Damian Green was the third minister to leave the cabinet in the space of a few weeks, after the defence secretary and international development minister both quit -- all three following separate scandals.

The chairman of the Conservative party, Patrick McLoughlin, was the first to go on Monday, telling Sky News that his time in government had been a "great privilege".

His replacement was announced on Twitter, only for the tweet to be almost immediately deleted. A different man, junior immigration minister Brandon Lewis, was then confirmed to the role.

"No wonder Theresa May's struggling to negotiate Brexit -- she can't even organise a reshuffle," tweeted opposition Labour MP Stephen Kinnock.

McLoughlin had been widely tipped for the sack after the disastrous snap elections last June, in which the Tories lost their majority in the House of Commons.

He also drew fire after a protester interrupted May's speech to the party conference in October -- an address that was also marred by a coughing fit and a collapsing set.

It was one of several low points in a turbulent year for the prime minister, who took over the helm of a divided government and country in July 2016 after the EU referendum.

While viewed as a chance at a fresh start, the reshuffle brings risks of upsetting the delicate balance of eurosceptic and pro-European ministers.

May was reportedly set to create a new "no-deal" cabinet post with responsibility to prepare for a possible breakdown in the talks with the European Union.

Britain is due to leave the bloc in March 2019, and although it has reached agreement on the key separation issues, the toughest talks on the future relationship have yet to begin.