pads and discs arrived this morning so i decided to get on with it heres a few pics (also if anyone would like to make an article using the pics feel free)
standard 238mm discs

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old caliper

wheel removed

caliper removed still connected

disc removed

disc comparison

grooved and vented discs and green stuff pads

19 16v calipers painted

disc and caliper installed

caliper with green stuff pads

new disc caliper and pads

new disc
entire job cost
calipers £45
discs £50
pads £28
other £15
job done this is really worth doing braking has improved by 100%