Winkworth bell! We still had those on the station vans and some unmarked saloons when I joined up. Absolute hoot they were, a little sprung toggle switch on the dash, "Ding a ling a ling!" Before you all deduce that I'm an ancient old fart I'd like to point out that this was in the mid-late 80s and the vans were Sherpas and the saloons were Mk2 Cavaliers (1.3 autos - so fast!.............Not!)
If I told you I was a pathological liar, would you believe me?
Peggy's got an MOT !!! (not a lie)