James Cleverly, a former senior government minister and Tory leadership hopeful, leads the debate for opponents of the bill.
He says he does not oppose it from a religious perspective - as he is an atheist - and he has also experienced terminal illness upfront - one of his closest friends died of cancer recently.
Cleverly goes on to say that what was promised in terms of protections in the bill did not materialise at the committee stage.
And he then goes on to refute some of Kim Leadbeater's big arguments.
Cleverly says: "Whilst I respect the honourable lady, I disagree with her assessment that it is now or never.
And it is this bill or no bill.
"And that's a vote against this at third reading is a vote to maintain the status quo.
"None of those things are true."
He pays tribute to Leadbeater for bringing the debate - but says the legislation could be done better in the future.