Region: Hollow Point
If it's within the letter of the law, then yes, he should be allowed to. That doesn't mean that it's not a dirty move and that the opposition party shouldn't be pissed about it, but the people of Britain kind of did it to themselves by voting in favor of Brexit in the first place. It was never a realistic vision that Brexit would be clean for all sides involved and that heads, like Theresa May's, wouldn't roll or that parliament wouldn't be circumvented in some way.
Smiley Bob and Rigiaball