They are a one-policy party who will have no reason to continue to exist when (an if) Britain leaves Europe

Dream on squire! They are the largest party in the EU and will be around until we finally leave the EU and will fight the next General Election.

The idea that parliament is going to be evacuated for the centre stage of debate on Brexit is simply unimaginable...The idea the House won’t have its say is for the birds," he said.(Bercow)

Not quite what he said several months ago

"Labour MP Stephen Doughty asked Bercow in the Commons if a prorogation such as the one in 1948 could happen. The Speaker replied this would be “an unusual step”, but it was possible, although he had no idea whether the government had such plans" March 18th 2019
There would be a reluctance to do this as a Queen's speech would be required and there would thereby involve the monarchy. This is contrary to accepted procedures,where there is a presumption for parliamentary business to be carried out without involvement of the Queen.