Seriously, some RAF sorties were planes scrambled as the airfield was being bombed, others were standing patrols over the south coast while some by twin engine fighters involved chasing aircraft inland across the Midlands. The Chain Home RADAR only looked out so once a raid crossed the coast it was tracked by the observer corps, this was obviously not so good or as quick.
I wonder if the number of sorties x time on each side would be about the same final total?