Update.
Finally today at 12pm started to replace my brake caliper having gone to Euro Car Parts to get some thread locking paste, brake fluid and some copper grease.
Got the car raised on drivers front wheel and removed wheel. Removed the 2 12mm caliper bolts. Clamped the brake hose and gently undid the old hose and unwound caliper from brake hose.
Fitted new quide pins as a kit after greasing them with supplied. Removed new pads and kept them in order, to go back how they were. Fitted new brake pad fitting kit, metal parts. Re-fitted the pads after putting a bit of copper slip on edges near ends and back of pads.
Wound the brake hose back into the new caliper and fitted it with the new bolts and thread lock.
Bled the new caliper until bubbles had gone and fluid changed to a lighter colour.
Put the wheel back on and re tightened when lowered.
Tried to remove passenger front wheel to bleed NS front caliper but wheel nuts so tight couldn't remove 2 of the wheel nuts, need to find a bit of scaffolding pole!
May just get garage to remove wheel, fit new brake fitting kit, and quide pins and fully bleed all calipers shortly.
Went on a little drive and pedal feels fine and stops same as before.
James