Mrs. Betty Slocombe is wearing a pink outfit, however Queen Elizabeth's favorite color would be light blue or canary yellow.
Mr. Harman's transistor radio, featured during the end credit for 'Radio Voice', is a Philips 90AL072 in cream and black.
As Mr. Tebbs is being introduced as the new Senior salesman, it's mentioned that Mr. Humphries was considered but too young. Two episodes earlier as Mr. Grainger was about to be sacked, Humphries was going to be promoted.