The ‘Verification of identity and right to work in the UK’ guidance document states the below;
Financial statements that can be accepted as proof of Identity (ID) are bank, building society, credit card, credit union, pension or endowment statements that are dated within the last six months (financial statements used for a DBS must be dated within three months).
Financial statements issued outside of the EEA cannot be accepted.
Online documents
Online documents cannot be accepted as proof of ID.
Statements printed in branch
If your bank or building society has printed a statement for you in branch, this can be accepted as proof of ID for pre-employment checks as long as it is dated within the last six months (three months for DBS). Statements printed in branch should be stamped and dated by the bank, however if the printed statement clearly states it has been 'printed in branch' the bank stamp and date is not required.