Most of the signal intercepts that arrived at Bletchley Park came by the hands of the motorcycle dispatch riders, who came into and out of Bletchley Park by a gate at the rear of the complex.
One rider remembers ” there was always someone to show the pass to at the gate. You just walk straight in, you never had to wait, and gave it to the Wren on the desk. You emptied your bag and put the new stuff (outgoing messages) in the bag and went straight back out. They were big envelopes with big red seals that said “on his Majesty’s Service” and “most secret”. I knew that it was a secret place, what they did I didn’t know. It’s only after the war we realised the stuff we were carrying was really vital in the war effort” (Darrell Briggs, Dispatch Rider)
The dispatch riders could stop any army vehicle in an emergency and asked for petrol. They were not held up or delayed at road blocks by either the police or the military and they could seek assistance and shelter at army camps or barracks when on duty.
But it was a hard and dangerous job. They had to travel backwards and forwards from the intercept stations at all times of day and night and in all weathers. One worker at Bletchley remembers “. I can still see an army motorbike dispatch rider, arriving one dark winter nights at Bletchley Park from an intercept station, covered from head to foot with snow. (James Thirsk). Another recalls “The debt that we owe to these riders, who face all kinds of weather on their motorcycles has never, to my knowledge, been properly recognised” (Gordon Welchman).