We can all name at least one musician who has performed behind a balaclava, helmet, or hood. Whether to preserve anonymity, cultivate mystery, or construct an entirely new artistic identity, masking the face is common among those under the limelight.
Katie Sayer chats to Callum Cameron, the writer and star of They Built It, No One Came – coming to Oxford following a successful run at the Edinburgh Fringe and a sell-out week in London