British General Double Metal-clad socket, 2 x 2.1A USB | DIY at B&Q
BG Electrical nbs22u3g Double Switched Fast Charging Power Socket with Two USB Charging Ports, 13 A, Brushed Steel with Grey Inserts : Amazon.co.uk: DIY & Tools
Masterplug 2 Gang 13a Switched Socket with 2 x USB | Woodie's
13A Twin Switched Socket with 3 x USB - 3.1A Shared - Nexus - White | BG (822U33-01)