The reliable way to hire a tradesperson

Hi Guys Scraped back all loose adhesive and loose skim plaster. Do I need to treat the wall before re-tiling? Also can a just pop in some adhesive to make up the gaps on plaster?

Have been thinking of plug in solar,1000w solar panels to rear of garage connected to ecoflow stream ultra X inside garage, plugged into garage electrical socket. The fuse box is the old metal box with wired fuse variety,this leads under ground then down the side of my house inside a plastic conduit, then into the external meter box. It is not connected to my house consumer unit. I definitely know the garage fuse box will need updated. But need to know is this even a viable way of plug in solar since it's not connected to my consumer unit ?

Hi, I have recently undercoated doors and frames with Dulux trade undercoat. They are different woods, and even with four coats of undercoat, they are still showing as different shades of white, the doors are more cream. I would like the finish to be uniform white. Will the topcoat do that, or should I Zinser bin first? Or will Dulux Once solve the problem? I don't really want to use Dulux Once. Rather use normal satinwood. Grateful for your advice.