Thats the way things are at the moment but this will change at the end of the summer schedule in October. Checked random dates in November and all Shannon-Liverpool flights operate with a Shannon based aircraft departing Shannon at 8AM and arriving back at 10.25AM (flights an hour earlier on Saturdays). Similiarly all Luton and East Midlands flights will be operated by Shannon based aircraft. I've checked, and as far as I can see from the end of October all flights to/from Shannon are operated by Shannon based aircraft!