[Sorted]

Yes it is an SS Matt with the Forks down through the yokes a fair bit already and like yours, not really enough ground clearance.

MCT at Stowmarket sorted my forks and shock over the winter but they also agree with my thoughts, that more ride height is needed.

I don't want to throw money at it (cuz that's not what DD is about).
So on the lookout for a better (2nd hand) and preferably a ride height adjustable shock.