TSB has announced the locations of 82 branches that will close next year, with the loss of around 370 jobs across the country.
The high street lender revealed earlier this week that some branches would close as part of plans to save £100m in costs by 2022.
New chief executive Debbie Crosbie has attempted to draw a line under technology problems which affected almost 2 million customers last year.
A smaller tech glitch last week caused some customers to receive payments late.
Jenny Ross, money editor, at consumer group Which? said the branch closures would hit communities hard.
"Our research has found two thirds of people would find life difficult without convenient access to a branch, while 11 million people lack the confidence to carry out basic banking tasks online," Ms Ross said.
"If banks want their customers to go online they must ensure they can deliver consistently reliable services - instead of the current rate of regular IT glitches that people endure. The next government should urgently intervene with legislation that protects access to cash as a vital backup and for as long as it is needed.”
TSB's customer banking director Robin Bulloch, reassured customers that they would be fully supported while the closures take place.
"We realise this is difficult news for our branch partners and will do everything to support those affected to offer voluntary redundancies and redeploy as many people as we can to other roles."
TSB branches to close
Newcastle Upon Tyne - Chillingham Road (September)
North West England:
Chorlton, Manchester (October)
Warrington - Penketh (October)
St Annes-on-Sea (November)
Yorkshire and the Humber:
Headingley, Leeds (February),
Thorne (April), Skipton (May),
Hull - Willerby (May),
Market Weighton (July),
Leicester - Cavendish Road (May)
St Albans (September),
Ipswich - Felixstowe Road (September)
Birmingham - Great Hampton (April),
Coventry - Walsgrave Road (April),
Birmingham - Stirchley (September),
Coventry - Jubilee Crescent (November),
Leamington Spa (November),
Sutton Coldfield (November),
Bearwood Road, Smethwick (November)
South West England:
South East England:
Burgess Hill (April),
Elephant and Castle (February),
St James's Park (September),
Gidea Park (November),
Old Street (November),
Potters Bar (November)
Glasgow - Govan (May),
Edinburgh - Clerk Street (July),
Edinburgh - Morningside (September),