Happy Eater was taken over by the company that owned Little Chef about 25 years ago. I used to deal with the insurance claims for Imperial group who sold them to Trusthosue Forte, the owners of Little Chef.
As for Keymarkets and Bejam, my first two employers!!!!
I can remember Bellmans in London Road (Dept Store), Pips Ices in Oxford Street(little old romany couple) and Coopers barbers in Baker Street (Uncle Fester). Potters where my school uniforms came from opposite St Peters Church and the Trafalgar Cafe in Trafalgar St (Best hotdogs ever)