Hi Adrian,
Happy to drive to Crawley if they can do it - at a reasonable cost
Update, some more replies today, another auto locksmith telling me that it can't be programmed unless it has "virgin chip".
Someone is selling "virgin chips" on eBay for £20, he wants £100-£130 to change the chip and program (inclusive of chip). Add to this cost of 2nd hand key and driving back and forth to London I would rather spend £200 odd for the genuine brand new key from Audi.
I'm still hoping someone somewhere can do it