alfa specialist in Hungerford/Newbury area

Steve.
Not exactly Newbury, but if 30-ish miles isn't too far to travel, then I can personally recommend AHM in Hartley Wintney... Often mentioned on here and I used them when I had an Abarth Spider a few years ago.
https://alfacare.co.uk

Not really in the area, but not far away. The most reasonably priced Alfa specialist I have ever used is A for Alfa in Aylesbury. They are very small, but very good and their prices are reasonable.