Terribull I too remember Lyons Corner houses. Proper restaurants, and uite smart, but open to all. it is where we usually ate when we come up to London from the suburbs.
The Indian and Ceylon governments separately funded lovely tea houses, one in Hay Market, the other in Oxford Street. Delicious tea and light bite catering.
All the department stores, Swan & Edgar at Piccadilly and convenien for where I liked. Dickens & Jones at the top of Regent Street with its lovely logo of a woman's head developing from a picture of a rose. I saw that same logo yesterday, on a hat box in the window of a local charity shop. Its clothes had much more edge and were more fashionable than other more run of the mill department stores.
Oxford Street was department stores end to end on one side, or it felt like that.