E2C is too tall, if I remember correctly it could be launched but could not fit into the hanger. The Tracer would barley fit.
Wessex was 15' 10" tall - Hawkeye was 18' 4" tall - Tracer was 16' 10" tall
As you can see Wessex only just fit!
I think unless the British went with an improved Gannet AEW 7 it would have to be a Seaking AEW