Listed below are physical shops that sell retro games in the United Kingdom, along with map links to find them. If there are other shops that sell retro games that is not listed here, please drop me an email at uknesboy(@)gmail.com and it’ll be added to the list.
Console Passion
12 Ainsdale Ave, Blackpool, Lancashire FY2 0ET
G-Force Gaming
77 Union Street, Glasgow, Lanarkshire G1 3TA
Game-Smart Yardley
548 Hobmoor Road, Yardley, Birmingham, B25 8TN
Gamer Nights
Unit 26 Main Market Hall, Carleton Street, Castleford, West Yorkshire WF10 1BE
Gamescene Bristol
723 Fishponds Rd, Bristol BS16 3UW Google Maps
68 Regent Street, Kingswood, Bristol, BS15 8JA Google Maps
20 Temple Street, Keynsham, Bristol, BS31 1EH Google Maps
Level-Up Games
22 Burgate, Canterbury, Kent CT1 2HG
Level Up Liverpool *2
Quiggins @ Grand Central, 35 Renshaw Street, Liverpool, Merseyside, L1 2SF
M.T Games Exchange
21-23 Meadow St, Weston-super-Mare, Avon BS23 1QQ
Playnation Games
Raven Games *1
74 Bromley Road, New Beckenham, Beckenham, BR3 5NP
Retro Game Base
430 Streatham High Road, London, SW16 3PX
Retro World – Derby
Shop 42g, Theatre Walk, Eagle Market, Derby, DE12AZ
Super Tomato
17 Salisbury Rd, Cardiff CF24 4AA
The GameLynx
114 Kilmarnock Road, Shawlands Arcade, Glasgow, G41 3NN
The Retro Game Shop
52 Church Street, Northern Quarter, Manchester, M4 1PW
X-Electrical
125 King Street, London, W6 9JG
With thanks:
*1 – Thanks to Aaron
*2 – Thanks to @pablo_0151 and @monchhichi72
UKNESBoy 
Reading these makes me wish I was back in the UK. There’s sod all for retro gaming in NZ.
CAN ANYONE HELP ME. TRYING TO FIND A P.S. ONE GAME CALLED “D” WILL PAY GOOD MONEY .TEXT OR RING ROB ON 07478010082 ANYTIME. MANY YHANKS ROB
Retro Hub Shop
6 Brewery Street, Rugeley
Staffordshire, WS15 2DY
http://www.retrohubshop.com
http://www.facebook.com/retrohubshop