- Nationwide - Ballymena
- Nationwide - Banbury
- Nationwide - Bangor, 258 High Street
- Nationwide - Bangor, 76 Main Street
- Nationwide - Barking
- Nationwide - Barkingside
- Nationwide - Barnet
- Nationwide - Barnsley
- Nationwide - Barnstaple
- Nationwide - Barrow-in-Furness
- Nationwide - Barry
- Nationwide - Basildon
- Nationwide - Basingstoke
- Nationwide - Bath, 21-22 Union St
- Nationwide - Battle
- Nationwide - Beaconsfield
- Nationwide - Beccles
- Nationwide - Beckenham
- Nationwide - Bedford
- Nationwide - Bedworth
- Nationwide - Beeston, 1 High Road
- Nationwide - Beeston, 8 The Square
- Nationwide - Belfast
- Nationwide - Belfast (NI), 53 Royal Avenue
- Nationwide - Berkhamsted
- Nationwide - Bexhill-on-Sea
- Nationwide - Bexleyheath
- Nationwide - Bicester
- Nationwide - Bideford
- Nationwide - Biggleswade
- Nationwide - Bilston
- Nationwide - Birchington
- Nationwide - Birkenhead
- Nationwide - Birmingham, 1 Church Road
- Nationwide - Birmingham, 1137 Warwick Road
- Nationwide - Birmingham, 17/19 Alcester Road South
- Nationwide - Birmingham, 171 High Street
- Nationwide - Birmingham, 180 Soho Road
- Nationwide - Birmingham, 21 High Street
- Nationwide - Birmingham, 357 Coventry Road
- Nationwide - Birstall
- Nationwide - Bishop's Stortford
- Nationwide - Bishop's Stortford
- Nationwide - Bitterne
- Nationwide - Blackburn
- Nationwide - Blackpool
- Nationwide - Blairgowrie
- Nationwide - Blandford Forum
- Nationwide - Bletchley
- Nationwide - Blyth
- Nationwide - Bognor Regis
- Nationwide - Bolton
- Nationwide - Bootle
- Nationwide - Borehamwood
- Nationwide - Boscombe
- Nationwide - Boston
- Nationwide - Bourne
- Nationwide - Bournemouth, 10 Old Christchurch Road
- Nationwide - Bournemouth, 10 Southbourne Grove
- Nationwide - Bournemouth, 448 Wimborne Road
- Nationwide - Bow
- Nationwide - Bracknell
- Nationwide - Bradford
- Nationwide - Braintree
- Nationwide - Brentwood
- Nationwide - Bridgend
- Nationwide - Bridgnorth
- Nationwide - Bridgwater
- Nationwide - Bridport
- Nationwide - Brierley Hill
- Nationwide - Brighton, 117 London Rd
- Nationwide - Brighton, 58 High Street
- Nationwide - Brighton, New Oxford House
- Nationwide - Bristol, 27 Regent Street
- Nationwide - Bristol, Cabot Circus
- Nationwide - Brixton
- Nationwide - Broadstairs
- Nationwide - Broadstone
- Nationwide - Bromborough
- Nationwide - Bromley
- Nationwide - Bromsgrove
- Nationwide - Burgess Hill
- Nationwide - Burnham
- Nationwide - Burnham-on-Sea
- Nationwide - Burnley
- Nationwide - Burton upon Trent
- Nationwide - Bury
- Nationwide - Bury St. Edmunds
- Nationwide - Buxton