Has Speaker Bercow crossed a line?

Paul Waugh thinks that many Conservative MPs think he might have done and are discussing what action to take. Read The Standard article for the specifics, here's the conclusion:

"Some Tories tell me that the private discussions about unseating the Speaker are now becoming matters of open debate in the Tea Room.

"It's a question of when, not if, he is challenged," one says. "I don't wake up wanting to pick a fight with Mr Speaker. But I wonder whether he wakes up in the morning and wonders which Tory MP he wants to pick a fight with."

...

UPDATE: Tory backbenchers are going to the whips tonight to express their displeasure with the Speaker. I hear that one of the delegation is also to go directly to David Cameron himself."