wallp -
I'm surprised that LTN isn't second behind LGW, as it has more aircraft based than any other airport except LGW and possibly MXP I believe. I guess whilst BRS has more destinations, routes are typically served less frequently.
Correct. Below shows the number of based aircraft at EZY/EZS biggest bases.
LGW - 56
LTN - 19
MXP - 18
GVA - 15
BRS - 12
SXF - 10