ive done it a few times from london,,,, first time we left at 5:30 and got there at 9:30ish...... left at 6:30 in the pissing down rain,,,, back at 9...... that was dropping 1 person off at luton and another off at st albans,,,, was a intersting drive back,,,, wasnt me driving at 140 in the rain though !!!

other times i got there and back at around 9ish at night