12 hours minus 4 hrs for voting, divided by 15 topics is about half an hour each. I do not regard that as "plenty of time."

Leaving Brexit and the details of this topic aside for the moment, the whole mechanism of our system is that the revising chamber identifies area of a bills where it recommends the commons thinks more carefully. Having done so, the Commons may leave things unchanged or modify the proposal to address the concerns.

I do not agree that can be done adequately in 30 minutes (on average).