I noticed a post here a couple of weeks back where someone was having problems with new Shimano brakes being soft despite multiple bleeds.
Someone posted up on the thread with a suggestions of how to resolve the problem.

I’ve tried using the search function on the forum but as ever it’s close to useless so could anyone point me in the right direction please?

This one?

http://singletrackworld.com/forum/topic/shimano-good-bleed-but-spongy-lever

Google search, STW search is about as much use as a chocolate tea pot.

That’s the one, thanks for that 😀