Hey Gareth,
Yes, they replaced the water pump and aux belt.
From what i can gather, its a whole new engine, but i was curious if it would simply be the engine block itself, or other parts such as turbo, cat etc? I was initially told it was £11,000, then when i got a call back i was told it was upwards of £20,000.
The tensioner was sent away to Audi technical for examination.