I finally followed up on the leaking fluid inside the rear nearside wheel, which appeared a few days after getting back from Le Mans. As I suspected, it was confirmed as the shock absorbers. Given this pair was fitted in 2008 & are nine years old, I considered replacing them with Gaz Golds or Bilsteins (if available) but needed the car on the road for the following weekend’s trip up to the Lakes. The local garage whipped both rears off Friday & sent them down to Protech who fitted new seals & sent them back for refitting Wednesday – not bad in four working days! Unfortunately the stiffness setting was not recorded before refit so the new settings are a pure guess at six turns. Hopefully I have the paperwork from TopCats who I think set the suspension up way back when (although no idea if it still applies).