Thanks for the advice Paul, especially the bit about not being able to code to new the battery and needing to buy another. How ridiculous is that! I am glad that I havent jumped the car, its stuck on my drive so there's not much Audi can do for me at this point either.
Prices for a replacement battery vary wildly, this seems to be the best deal but I have never heard of Enduroline. No doubt a rebrand as this is rife in the battery market like many others.
https://www.tayna.co.uk/019-Enduroli...CCA-P8385.html
Staying with OEM this is the best I can find
https://www.tayna.co.uk/Type-019-Var...ery-P3127.html
This is all a bit messy. ECP has 3 or 4 batteries but they are more than double the price and same spec/warranty, I cannot work out the difference.