May's cross-party talks with Labor seem to have achieved little more than angering her own party.
The fourth and last parliamentary vote on the UK's Brexit deal with the EU is widely espected to be unsuccessful.
The British leader still hopes to realize Brexit before the summer.
Saturday's rally has become the largest anti-Brexit demonstration ever, and the second largest protest in London to date.
Brexit may not happen at all if the British Parliament doesn't utilize its second Brexit deal change, the EC chief
Jeremy Corbyn, the leader of the largest opposition party, Labor, is under increased pressure to call for a new referendum
The British Cabinet is now facing a no confidence vote, and the fate of Brexit is a huge question mark
The British Prime Minister is trying to save the Brexit deal from a widely anticipated parliamentary defeat.
The office of British Prime Minister Theresa May has turned down a call by former Education Secretary and ruling party