Thanks so much guys.
The mechanic claimed to try the hose crimping trick, so I went with a quick MC bleed.
Seems to be an improvement, but I'll need to get it out on the road to really test it.
Given it's not registered I can't drive it in the dark.
The calipers haven't been rebuilt, so I'll see if the bleed fixes it.
Been a while since we've heard about your engine Locky - how about an update!? :-)