May's Brussels gains eclipsed by domestic challenge on Brexit

London

THERESA May's battle to get her Brexit legislation through Parliament hit a new roadblock as the Labour Party threatened to unite with Tory rebels, eclipsing the small victory she brought home from a summit of European leaders.

The UK prime minister returned from Brussels bolstered by encouraging words from her European counterparts, who signalled that a breakthrough in Brexit talks may be possible by year-end - as long as she can convince her fractious Cabinet to let her pay the Europeans a bigger divorce bill.

Her political fragility was underlined on Sunday when Keir Starmer of the opposition Labour Party issued her an ultimatum: accept major changes to her landmark le…