This is plasterboard or something with a void about an inch back
This is the wall plug
The hole here is actually so big that the wall plug would fall through into the void if I put it back
I can't move the radiator up or down or left or right because it is fixed and even if I knew how to disconnect it I wouldn't want to spill black water everywhere and ruin the carpet, so I am thinking I should use the same holes but get a bigger plug
What about the plastic ones for plasterboard that sort of butterfly out when you fix them in?
This is the type of screwdriver:
https://www.ebay.co.uk/itm/383465817336
Apologies for the eBay link, but I can't post pictures to a reply. There are cheaper examples on Amazon, but then you have to deal with Amazon ๐คท๐ปโโ๏ธ
Looks great thanks