yeah, saw those on screwfix but don't quite understand how you use
them...There's the resin, you pump that in the hole, but what 'fixing'
do you use ? Those resin studs worry me...you just push them in and
hope the resin grabs the thread of the stud ? how do you know if the
brick hasn't soaked up all the resin too quickly to have anything left
to grip the stud by the time you get it in the hole ?

maybe I'm missing something very basic here :-)

Ant.