Having been reading the papers and thinking about this over the weekend, I've come to the conclusion that the Tory party is completely and utterly screwed. They've managed to get themselves into a position from which there is no way out.
On the one hand it is patently clear that if there were to be a GE before we have left the EU, then the Tories would be wiped out. A large proportion of would-be Tory voters would abandon them and vote for the Brexit party. Labour would doubtless be similarly impacted, but nothing like as bad and would imo win a comfortable majority. With a near-Marxist PM and Marxist chancellor, a truly frightening prospect.
On the other hand, the strong showing of the Brexit party in the Euro elections has made compromise with the ERG impossible, and with it, any prospect of a negotiated soft Brexit which could conceivably command a majority in the HoC. And there's also no chance of getting a majority for a no deal Brexit, given the parliamentary arithmetic.
So I cannot see any way in which the Tories can deliver Brexit, which they needy to do if they are not to be obliterated in the next GE. Us "defaulting" out on a no-deal Brexit will be blocked by the HoC. They are fecked.
Maybe parliament can force a 2nd referendum, which I imagine Remain would win, and in that scenario, the Tory vote will also be decimated at the next GE. Any which way, they are fecked.