I worked in Lewis,s in the 1960/70s and there were 5 selling floors plus basement .
The 6th floor was two restaurants 1 self service the other waitress service
The 7th floor was the staff restaurants.there were four staff restaurants 1 for staff 1 for assistant managers both self service then 1 for managers and 1 for senior managers both waitress service .
Underneath the basement was the sub basement which held the staff cloakrooms 1 for women 1 for men . and a few stockrooms.
Underneath the sub basement was a the boiler room.
The basement held tools,tiles, wood, gardening, electriacl goods, hardware,ironmongery, kitchen ware .
Ground floor "B" block was food and pets, the pet shop was closed cus a member of staff died of parrotts disease above that was mens wear , above that ladies wear , third floor was linens and soft funrishings and ladies hairdressing , fourth floor was furniture , Fitfh floor seasonal departments ie Toys,
in The A block ground floor was toiletries, cosmetics, fashion acessories, first floor fashion fabrics miss selfridge, 2nd floor ladies outerwear ,3rd floor beds , 4th floor sofas etc 5th floor seasonal ,
I think childrens wear was on the second floor .
The record shop was outside underneath opposite zissmans menswear , and a coffee bar.
There used to be saying that if you stood outside Lewis,s on a saturday you would see everyone you have ever known.