[ChrisCurvyS]

Many thanks for the reply and the info. I was going to go down the braided lines route however turns out the existing lines are fine - was actually the fork leaking down the back onto the part of the line where it is attached to the fork leg.
I'd foolishly not thought of that as the fork seals were done by a garage just last year and I've hardly ridden since.
Going to try one the Seal Mate tool before paying out for it again- checking the brake caliper seals led to seriously stuck pistons so I'm spending the MoT budget on a brake rebuild.