Well, after a quick phone call to my favourite Uni-Thread at mid day on saturday I asked for a helicoil bunch and a tap for the ill-fated M10x1.00, they said "yes sir, it'll be with you on Monday", tongue in cheek I thought different, but horray for Uni-Thread here they were at lunchtime!
I dug a 10mm drill out that was brand new and put some grease on it to pick up the shards of master cylinder, with the variable speed drill set to lowest I slowly cut the damaged threads out and cleaned the bits of metal out, with the new tap once again I put some grease on to pick up the shards and slowly put my MoD Apprenticeship skills to task and slowly cut in the holder thread.
The casting is very "bitty" in that it is very crystalling in content, needless to say it put me on tender hooks as I didn't want to take the tap to the end and strip the new threads out by a lack of concentration.
However, when I felt it showing signs of no more, out she came and with a feeding tool from another M10 kit I got in it went and all is fixed
ok, what else can I rubbish now.......