I think GRO will do the best in yeild and passengers but you need to remenber that its Easter Hoildays and Girona and Milan are bound to do very well with Irish Passengers anyway.
I took one of the first BGY flights, just over 50 each way, lovely city by the way and a good base to visit Verona, Lake Garda/Como & Milan. One family onboard had come from west Cork!
March UK CAA figures show some growth:
LGW 6058 +20%
BHX 3563 +19%
LPL 7088 +23%
MAN 1702 – 42% (SNN-MAN +34%)
MAN could be down to FlyBe lower aircraft capacity, but brand awareness and cost must be a factor, looking at a weekend in June FR LPL headline fare is €36 return, BE MAN €119. Extra frequency at weekends could help make BE more attractive.