Only tangentially relevant to deposits, but I thought I'll add it here.
After a number of bank branches closed, post office branches are now closing too.

London post office branches that are at risk of closing:
- City of London - 12 Eastcheap, London, EC3M 1AJ
- High Holborn - 181 High Holborn, London, WC1V 7RL
- London Bridge - 19A Borough High Street, London, SE1 9SF
- Mount Pleasant - Rosebery Avenue, London, EC1R 4SQ (Clerkenwell)
- Lupus Street - 121-125 Lupus Street, London, SW1V 3EW(Pimlico)
- Islington - 160-161 Upper Street, London, N1 1US