FFC
I can only speak for BHX but May is always bad and so is June (if not worse).
The BHX figure is blamed on the lack of connecting pax to Asia. AI, T5 & PK all record poor figures during May & June (weather related in some instances I believe).
The BHX service most affected is EK40 the 773 but EK38 which
connects with the Australia routes usually hold up a bit better.
Don't panic they will pick up by July.
Always a good time to go to Dubai (a little hot though), as the prices are
usually reasonable
Pete