Bob,
I see you've been busy listing .. well I guess its you.
Simplistically - at the current time :
BA2226 ATL-LGW is best bet with 20+ empty seats and about a dozen staff inc you.
BA2166 TPA-LGW looks OK with 18 empty and ten staff on the list inc you.
BA2036 MCO-LGW would be tight with about 20 empty and just over 20 on the list.

TPA or ATL would be my bet depending upon where you are and how you'd get there.

Good Luck.