Originally Posted by Hugh

The Benn Bill was published on the 2nd September, submitted to the Speaker* on the 3rd September, debated and passed through the Houses 4th to 6th September, Queen’s Assent 9th September - that’s 6 working days (not included is the time spent writing, agreeing, lawyers reviewing, rewriting the actual bill).

The Cooper-Letwin Bill was presented to the Speaker* on the 2nd April, introduced to the House on 3rd April, passed on the 3rd, went to the House of Lords on the 4th April, House of Lords Committee and Report Stage 8th of April, Common vote on House of Lords amendment and Royal Assent on 8th April - that’s 4 working days (again, this does not include any time spent writing, agreeing, lawyers reviewing, rewriting the actual bill).

Neither of those appear to have been "cobbled together" in one day...

*bills must be presented to the Speaker on (at least) the day before being introduced to the House