I knew the following day would be awful if we did. Plus we didn't know when we were going to leave. We couldn't stay in the airport indefinitely. Fortunately London is much better set up for arriving bicycle tourists than it was last time I was there in 1991. They have an express train with a baggage car that goes regularly to and from both Gatwick and Heathrow airports.
Bikes are no problem on either train.
By midnight we were wandering around the streets near Victoria station in London looking for a hotel. Thanks to the rough guide we had a place in 15 minutes. Gibraltar, though very British, is on Spanish time. But in London it was between 7 and 9. We went back to Victoria Station.