its_all_Greek
Distinguished Member
Get yourself a long drill bit and drill in from the outside, just dont use hammer action on the drill as your only really drilling through plaster which is soft
https://www.screwfix.com/p/erbauer-sds-plus-shank-masonry-drill-bit-8-x-450mm/8382v
I know the one above is an SDS fitting if you don't have an SDS drill then uyou can get them for normal hammer action drills. Just redrill the TV mount etc as it doesn't matter if its in the same place, if you hit the same holes all good if not then no worries.
https://www.screwfix.com/p/erbauer-sds-plus-shank-masonry-drill-bit-8-x-450mm/8382v
I know the one above is an SDS fitting if you don't have an SDS drill then uyou can get them for normal hammer action drills. Just redrill the TV mount etc as it doesn't matter if its in the same place, if you hit the same holes all good if not then no worries.