dade for holesaws
Holesaw - Dust and Debris Eliminator
you use any set of nice holesaws you have, and all the crap do not fall on your head and customers carpet. must have for downlights etc.
not so much of electricians tools, but:
Toolstation > Painting & Decorating > Decorators Tools > Flexible Mixing Bowl
nice flexible reusable mixing bowl to mix that small bit of plaster to fill a small chase or around the sockets, or a bit of cement when crappy walls and nothing to attach mounting boxes to.
plus set of quality filling knives:
Toolstation > Painting & Decorating > Decorators Tools > Professional Filling Knife
they dont rust and make a nice smooth finish.
plus 2 liters plastic storage container with multi finish plaster mixed a bit with plasterboard adhesive and 0.5 liters of cement to carry with you when big bags staying on the van.
(in case of wrongly drilled downlight holes, access holes or general filling and patching)
i have a magnet to be attached to a a cable rod, plus another small magnet on a piece of string for fishing cables in the wall...
bad---- AA battery powered headtorch, i`m running it on sanyo rechargeable batteries, and yeah, its BRIGHT.
tyvek overalls (screwfix) for itchy lofts.
not a toy, but this leather fingerless gloves beat all the others you can get in "trade" shops. dewalt etc. they are made for climbing but do very well on building site
Singing Rock Grippy Gloves ¾ Size 9, Pair of. | eBay
they have small sizes too, not like your usual xxl trademan builder type.
been trying them armeg box sinkers, no use for me, not good on bricks, and breezeblocks going nicely with a sds "tile lifter" mentioned in some previous post.
last but not least, humble dust pan!
Toolstation > Hand Tools > Builders Tools > Dust Pan
its metal and its efficiency its 300% better than cheapo plastic ones. wont break if you step on it either. just mark it with your name otherwise builders will nick it very very quickly.