 The effect of his actions meant that the signal would now revert to clear once a train had passed it by just 33 yards, rather than the 615 yards it was designed to.When he returned to the station he stood by the tunnel headwall with a red hand lamp and held every train for one minute after the signal turned green as a precautionary measure.After several trains had passed he went in search of a second wire with the intention of temporarily connecting the faulty signal's circuit to an unused pair of contacts on the same relay, to restore normal operation.