Paddy is spot on for the BA short-haul fleet generally. The closer to the front of the cabin the better due to seat use for C passengers on international sectors. Having said that, I think there are one or two 75s configured only for domestic shuttle flights to which this advice might not apply.
Be wary of the rows just ahead of emergency exits too - no recline on seat back which can be a bit of a (literal) pain if the flight is more than an hour or so.