Nowt Wrong with that LOL..... AVM Leigh-Mallory was in charge of 3grp Fighter Command... the one that covered Norfolk upwards on the Left-hand side of the country ( Norfolk, Yorkshire, Tyneside etc.... )
its stated in numerous texts and the film Battle of Britain ( old film but still ace lol ) that his fighter sqaudrons were often late to the fight, choosing to attack the enemy bombers after they had already attacked the airfields of 2grp much to the annoyance of AVM Keith Park who's Squadrons in Kent and the Southeast took the brunt of the casualties and airfield damage during the Battle of Britain before they Luftwaffe turned on London.
The "Big Wing" bit comes from Leigh-Mallory's much vaunted tactic of massed squadrons attacking the enemy formations simultaneously, thus creating one huge "big wing" of figher aircraft, But Keith Park didnt like it much cos the "Big Wing" was always late to the party and the airfields got hammered