Well I am doing BA25 tomorrow so I can let you know what is on that one but being F I would imagine it would carry a full service on both flights. On my F return from HKG on the 23.25 they still offered a full meal service and we were up till the early hours eating and drinking! I wouldn't worry about it too much! Benefit with the earlier flight is you still have a good chunk of the first day to enjoy when you get there.

Get the 23:25 home though otherwise the 23.45 starts to get that little bit late for eating and gets in, obviously, after the 23.25 so the Arrivals Lounge and MB Spa starts to get a bit busier.

Is the HKG arrival at 5:05 the first flight in each morning?