Could be VERY interesting , feel sorry for the crew
Easyjet A319 156 passengers
BA A319 100-118 passengers (depending on C load)
Also BA club is 5 across which obviously frees up some locker space.
Most BA aircraft have wardrobes too (really for coats, but if you are 10 seconds away from pushback the odd large bag can go if the hold is closed)
They are biting off more than they can chew, and perhaps a CAA audit will reveal some overloaded cabins?
Will also harm their 'megafast' turnround practice , which is essential for lo-co .