Jobs are at risk at HSBC branches across the 海角视频 amid plans to close 27 sites this year.
Staff in 10 branches, which employ a combined 46 people, face losing their jobs under the closures.
However, those working at the other 17 branches earmarked to shut will be moved to other roles at nearby HSBC sites, the bank said.
It will also invest nearly £34m in its remaining 594 branches this year, and will refurbish 49 of them.
The announcement comes as customers turn to other forms of banking, making them less reliant on using a branch, the bank said.
HSBC said nine in 10 contacts with customers now happen over the phone, via the internet or on its smartphone app, with the number of customers who use a branch falling by a third in the last five years.
Only one in every 100 cash withdrawals are made in branch at an HSBC.
"Retaining a sustainable branch network is extremely important to us and we need to ensure it is fit for the future.
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"But, the way our customers bank with us has changed significantly over the last five to 10 years, and that change is something we cannot ignore," Stuart Haire, HSBC 海角视频's head of retail banking and wealth management, said.
The first closures will be made in early July, with branches in London, Bristol, Swindon and Leigh-on-Sea set to be axed.
HSBC customers will still be able to bank in Post Office branches across the country.
Mr Haire added: "Almost every industry is affected by similar behavioural change and needs to work hard to address that - newspapers used to be delivered by paper boys and girls, or a paper would be collected from a shop, and now most people consume their news online.
"Photographs that were once processed in a shop have now been replaced with digital cameras and online delivery."
Earlier this month, HSBC said its global headcount would be reduced by 35,000 over the next three years.
This would include "meaningful" cuts in the 海角视频, where it employs 40,000 people.
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The confirmed list of branch closures include Bristol Bedminster, Leigh-on-Sea, London Park Royal, Chingford, Swindon Old Town, Kensington High Street to close on July 3.
Blaby, Peterlee, Leigh Bradshawgate, Chard, Wallasey, Royston, Pudsey will close on July 10.
Croydon Wellesley Road, Saffron Walden, Tiverton, Ely, Pembroke will close on July 31.
Other closures closing later in 2020 include London Greenwich, London Regent Street, Redhill, Thetford, Sheffield Broomhill, Bourne, Cheltenham Bath Road, Coventry Corporation Street, Heswell.
The confirmed list of branch refurbishments taking place in the first half of 2020 are East Ham; Croydon North End; Ealing Broadway; Stratford Upon Avon; Hammersmith; Carmarthen; Lewisham; Cheltenham Promenade; Blackburn; Wembley; Bristol Kingswood; Wigan; Corby; 122 Finchley Road; Alton; Cardiff Rhyd y Penau; Castleford; Hinckley; Lowestoft; Lymington; Ormskirk; Ramsgate; Saxmundham; Welshpool; Witney.