As an occasional T4 user, I see the place as meltdown and feel very sorry for everybody who has to work there on a daily basis.
I'd not considered the load on ATC and for that apologise. Playing airport chess with a/c holding to get a gate at T4 can't be a barrel of laughs, especially when after the last 'snow' event, the other terminals were 'ops normal' fairly quickly!
Sadly, unless BA spread their load to LGW again, it would seem we're all stuck with it.
It's the pax for whom I feel most sorry. They seem to come last in all this.
G'day
