The Bank's annual reports to the City Council often included an analysis of the current number of branches in the network, by reference to the amount of Deposit Balances held by each branch. The figures reproduced below have been extracted from this source.

Year Ended March 31st:	1942	1952	1962	1973
Over £3 million	0	3	1	5
Over £2 million	0	5	5	14
Over £1 million	10	24	31	34
Over £500,000	18	26	25	14
Over £250,000	25	5	4	3
Below £250,000	12	5	2	1
Number of Branches	65	68	68	71
Average Branch Balance (£)	647,203	1,246,605	1,274,413	1,604,858