Whether her Brexit deal passes parliament or not this week, British Prime Minister Theresa May's days are numbered, experts have said. The Conservative leader has in the past won praise for her determination and ability to survive what has often felt like one long political crisis since the 2016 EU referendum. But her approach to the Brexit endgame, seeking

changes to the deal she herself negotiated with under three weeks to go until exit day, has prompted frustration and anger on all sides. Pro-European ministers are in revolt over the risk of a "no deal" exit, while Brexit hardliners are livid that her promise of a decisive divorce appears to be receding.

At the same time, criticism of May's legacy from six years as interior minister is growing following a surge in knife crime and an ongoing row over the treatment of migrants.

"At first she appeared to be a unifier, but she turned out to have too little courage, imagination or skill to lead the Brexit negotiations," said an editorial in the Conservative-backing Spectator magazine.

It reluctantly urged MPs to back May's divorce deal on Tuesday, but only so that Britain could "turn the page on this unhappy chapter of our political history".

May took office after the 2016 referendum, and despite having campaigned to stay in the EU, embraced the cause with the mantra "Brexit means Brexit".

Her promise to leave the EU's institutions and end free movement of workers delighted eurosceptic MPs, but caused dismay among many pro-Europeans. The splits in her Conservative party became a serious problem after a disastrous snap election in June 2017, when May lost her parliamentary majority.