Gateshead was the town where the Vault was located. (AUDIO: Tales from the Vault [+]Loading...["Tales from the Vault (audio story)"])
When the Sixth Doctor told Robbie Flint that he and his TARDIS came from far further afield than Sunderland, he asked if that meant Gateshead. (AUDIO: Criss-Cross [+]Loading...["Criss-Cross (audio story)"])