Thanks for that - not doing it for a living, just to make the room more 'liveable'?!!
Just to clarify, mortar ok for the deep holes around back box but not near cabling, then bonding (ok over cabling) to 2mm from surface then multi-finish. Is there an all-in-one that would be a suitable...
Could someone advise best products/practice to make good channels/sockets etc after wiring new sockets in kitchen? Some of the 'holes' are v. deep whereas others are shallow so not sure if I could use plaster throughout.