As a side note, the car has the DMGRS plenum valve fitted, I have an invoice for both the part itself, and another for fitting it, and even the old part in a box... The car came with a box of bits and I have what I assume is the club 3 way valve (The box it was in has Tim's name and address on it!) The actuator on top has a Bosch VW/Audi label. I thought that this was a spare for the plenum valve or an upgrade over the DMGRS one. I will check out the thread above, but could this be used for the interior valve?
I've taken a few pics of the area, the valve doesn't look terrible from what I can see, so perhaps its a minor weep. The new assumed club valve is in pic 5