Boris Johnson could be forced to resign by October, according to Guto Bebb, one of the Conservative rebels who was kicked out of the parliamentary party this week when he voted to make a no-deal Brexit in October illegal.

"I don't think he's going to get a general election, he says he's not going to extend, and I can't believe for a moment that a British prime minister would break the law, so logically he will have to resign," said Bebb.

Johnson appears to be running out of options: he has repeatedly said the UK will leave the EU on October 31, and said on a Thursday he would rather be "dead in a ditch" than seek a delay.

Labour look set to reject his request for a general election next week, throwing the future of his premiership into doubt.

Boris Johnson will be forced to resign instead of seeking a delay to Brexit, one of the Conservative members of parliament the prime minister expelled from his party this week has told Business Insider.

Guto Bebb, the MP for Aberconwy, was one of 21 Tory rebels who had the party whip removed this week when he voted against the government to make a no-deal Brexit on October 31 illegal.

The former defence minister said that the prime minister — whose attempt to call a general election in response was rebuffed by the opposition Labour Party — now appears to have no options left other than to resign or hand power to Labour leader Jeremy Corbyn, having claimed on Thursday that he would rather be "dead in a ditch" than ask Brussels for a delay.

"I'm not sure what else he can do," said Bebb.

"I don't think he's going to get a general election, he says he's not going to extend, and I can't believe for a moment that a British prime minister would break the law, so logically he will have to resign."

Read more: Boris Johnson could soon be forced to resign as prime minister and make way for Jeremy Corbyn

End game for Johnson?

Johnson has made a repeated "do-or-die" pledge to leave the EU on October 31. However, that now appears to be impossible unless he can force an election, win a majority, and overturn the law preventing a no-deal exit in October.

The problem is that the opposition Labour party is wary of agreeing to Johnson's demands for an October election and want to hold one after he has been forced to ask Brussels for an extension, a move which the prime minister fiercely opposes and could hugely damage his standing in the polls.

Bebb, who supports a second EU referendum, said the prime minister's decision to suspend parliament from next week — a move apparently designed to stop MPs from blocking his Brexit plans — had backfired spectacularly, because it had unified his opponents and prompted them to prevent a no-deal Brexit in October.

"This crisis is of his own making"

"This crisis is of his own making," Bebb said.

"There would not have been any significant action on no deal in this September sitting if it wasn't for the prime minister's decision to prorogue. This is a crisis that has been created by the prime minister acting on the advice he's been given by his advisers.

"He is now in a situation where, if everything I'm hearing is correct, he isn't going to get his election and he will have to extend," he said.

"And if he is saying he is not going to extend, he will have to resign, because it is inconceivable in my mind that a British prime minister would break the law."

"If people think this one through carefully, he will have no choice but to resign."