Ticket-backed booking
Steve Hackett
Odeon Theatre, Chelmsford · Sunday 4 November 1979
Ticket evidence
The surviving ticket prints “Odeon Theatre, Chelmsford”, Steve Hackett, Sunday 4 November 1979, stalls £3.25, and ticket number M 17. It is strong primary evidence for the advertised booking and an issued ticket.

Date note
The older Where & When index separately gives “Steve Hackett - Chelmsford Odeon 1980 (approx)”. The surviving ticket is more precise and prints 1979, so the original index wording is retained as a conflicting lead rather than used to override the ticket.