chase fill

There is a plastic central heating pipe chased up the corner of the room, too shallow and has caused quite bad cracking in the past. It looks like the chase was filled with some grey material, not brown bonding. At the top and bottom it was only a couple of mm under the skim. The middle its...

Hi guys, got a little project going on to mount a TV above a fireplace iwth a mantel. Decided to get power hooked up as well as a conduit for wiring. The areas marked red are loose/blown plaster. What would be the best way going about this? i've done patch work with plastering. Will be ripping...