Thanks for that, I'll measure them and see about having them skimmed.
May be of interest to somebody else so here is a link to the company website, seems there are a lot of centres about;
http://www.skimmydiscs.co.uk
Give McGraths a call. I had non maserati front pads fitted along with a disk skim. Saying that, the front brakes developed a squeak as I drove home. They said it had never happened before. After an attempt to refit and regrease, we gave up and i had proper Masser pads fitted. Squeak gone.
Do you know what brand of pads Mcgraths had tried fitting Elliot? (i.e. the ones that squeeled). Were they Pagid by any chance?