Ambassador, British Airways; FlyerTalk Posting Legend
Join Date: Apr 2012
Location: Leeds, UK
Programs: BA GGL/CCR, GfL, HH Diamond
Posts: 42,888
Yes there is a bp check and yes there is conformance.
i fully expect once you take off, and if still estimating an arrival which is 28 minutes or less before the scheduled departure time of the onward flight, that you will have been already offloaded and rebooked on a later flight.