Ok we know a bit more now. He boarded a train in Chelmsford that was London bound at around 12.40 today, so will easily have been in and out of London by now. My guess he's heading to the ports and will try and board the back of a trailer.
"Crucifixion?" "No - they said I could go free" "Really? - Oh, off you go then" "Only joking - Crucifixion it is" ...