I gave in to convention - TSR are posting me out some new Goodridge hoses tommorow - so they'll be nice and safe.
I've fitted new hard lines on the rear beam whilst I was at it - biggest pain in the arse ever, the flexi > hard line connection points couldn't be a worse place. That, coupled with rusted rounded fittings led to me topping up the swear box a fair bit.
My brake fluid hasn't been changed in many many years, so that should firm things up a bit too.
I'm going to disassemble the dodgy caliper - see if I can give others an insight into fixing the h/b mech.