found these in case your wall is plasterboard ( I never knew these existed till now so bookmarked for reference!)
https://www.ebay.co.uk/itm/313427211003
you could drill another hole in the back box offset from centre or if you use a full size box these have four holes in the back and all away from centre
https://www.toolstation.com/made4trade-metal-back-box/p14570
2a socket? If the driver has just a cable connection would an architrave box sunk in the wall covered with a blank plate to conceal the connections work? File a small slot in the edge of the plate to allow the driver cable exit.
Some blank plates have thick edges that can allow a cable to exit via a suitably filed slot. ( I have done it to allow speaker cables to exit using architrave plates) ie...
I don't know what the current capacity could be but would a pull switch like the ones used in sheltered housing etc to activate alarms work,
ie
https://www.tradesparky.com/wiring-accessories/ceiling-accessories/ceiling-switches/crab-2147-ceiling-switch-retractive-6a
Click scolmore do a 4 gang switch and you can remove individual switches and replace them with different switches like intermediate or push.
https://www.toolstation.com/click-mode-10a-switch/p41389
https://www.toolstation.com/click-mode-10a-switch/p71895
take the intermediate switch from the...