I have a slight weep of oil at the top of the Tdi in the Octy, above the temp sensor, is this the vacuum pump? Presume this will just be a simple gasket- no nasty surprises by just un bolting it & changing it?

(Yes, I shall be changing the temp sensor for a green one while I'm there :-))

Have you had the cam belt done recently? There is a rubber seal from memory. I managed to not do the rocker cover up tight and ended up with oil leaking out around the vacuum pump

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Riteo, will get the cover off & had a butchers.