How Are MPs Planning To Vote On The Assisted Dying Bill? 

Since it is a matter of conscience, MPs will be free to vote how they like rather than being whipped by party managers.

https://www.huffingtonpost.co.uk/entry/how-are-government-ministers-planning-to-vote-on-the-assisted-dying-bill_uk_671a32a3e4b0ede6b2c04d4f