By May 1855 the men were now ready to carry out the robbery, and only needed to wait for a day when a gold shipment was taking place. Tester altered the staff rosters to ensure Burgess was working on the evening mail service for the month to ensure Agar had access to the safe. A signal was arranged whereby either Agar or Pierce would wait outside London Bridge station every day; if a shipment was being made, Burgess would walk out of the station and wipe his face with a white handkerchief to alert them. At the same time, Tester would travel to Redhill railway station and await the first stop of the train. He would take one of the bags of gold and return to London.