I've been the unfortunate victim of what turns out to be a very common issue with the TD6 engine (I think that's the engine name). The turbo failed and spewed oil everywhere, new turbo, service and general deep clean of the engine cost £950.15 inc VAT. I think I came off quite well from this as I've not had to replace the entire engine.
I have changed the service interval I will be using down to 6000 miles as the issue was oil quality.
If anyone else has suffered from this and would like to share experiences, here is a good place to do so.