The pictures make it look much simpler than the exploded diagram suggests, should be easy enough to do when the spring gets here.
Yes that is the part I ordered, I grabbed a copy of the manual from there too as mine are all rough photocopies and the pictures are all just solid black blurs.
I'm at Norbury Junction on the Shropshire union.
The previous owner had diesel bug twice and fitted a fuel polisher system to prevent it happening again, he blamed this for the stalling when first started.
I also found a service invoice from 2015 with - Lube rack damper, fuel trigger, excess fuel plunger, element quadrants, etc.. as one of the items but nothing since.