Be aware the Bloc hotel King bed is just that a King bed, enclosed by wall on 3 sides, no room for anything else, and a shower in the toilet. When the hubby and I have an early am flight out of LGW, we arrive the night before and spend the night in a hotel, I thought we'd try Bloc since it is so convenient to the BA check-in. But I found with 2 persons, the setup was not comfortable. If you want to get out of the bed to use the toilet, you have to climb over the other person, not sure where a third, even a very small child would fit. For a single person, it might be ok.

Since that, I've always booked the Hilton, S Terminal, which just across the parking lot.