hiya
would be a good idea to get the fuel pump timing belt replaced at the same time , both belts can be done without removing the body, should include tensioners and tensioner bolts
indeed good call getting them changed seeing it’s 112k or 7 x years which ever comes first
Wouldn’t of thought it being more than £1500 for both to be done , personally whilst it’s apart would add an oil pump, water pump and aux belts, along with engine oil and filter , mainly for peace of mind, max price would be I imagine 2k
reason I also mention engine oil and filter is they can see if there’s any signs of metal in the filter
fuel pump belt is more involved than the D3 as it’s timed and more items have to be removed
Hope that helps