We've got a 945AM departure from T3 in March, so all we need is a bed for the night. I see Premier Inn advertising rooms at £39 but there are several locations. Does anyone have any experience of these?

A) 15 Bath Road, Hounslow
B) Shepiston Lane, Middlesex UB3 1RW
C) Heathrow Longford T5, 420 Bath Road, Longford,
West Drayton UB7 0RF

My major concerns are transport to T3 ( we will not have a car), and the cost of wifi at the hotel.

Any help appreciated.