London (CNN) With Brexit day only weeks away, and still no deal in place, now might not seem the best time for British politicians to flip the table over.

But this week, 11 Members of Parliament have done exactly that . On Monday, seven members of the opposition Labour Party announced that they were fed up of their leader Jeremy Corbyn, citing reasons ranging from rampant anti-Semitism to his lack of leadership on Brexit. They will now sit as independent MPs, but as a group (not a new party).

They were joined on Wednesday by another Labour colleague and, more problematically for the government, three members from the governing Conservative Party.

The Conservative defectors complicate matters when it comes to Brexit as the three are all vocal supporters of the EU. They have been particularly critical of Theresa May's tactics of pandering to the harder-line Brexiteers in her own party and elsewhere. That means it's now hard to see this new group as anything other than a pro-EU bloc in the UK Parliament, dissatisfied with the pro-Brexit positions of both government and opposition.

Why does that matter?

Read More