Last night I went to my local Tesco extra (Watford) as the Bundaberg ginger beer is advertised on offer @ £2.99 (normally £4.49) and only available from larger stores. However, when I got to the checkout it scanned at £1.30.
I don't know if this is just at the Watford store, or if it is an error, and possibly the price will be back to £2.99 soon I think, but it is still a good price imho. Same offer at Ocado, I think. The Tesco £2.99 offer ends on 22.07.
If you like ginger beer, give this a try: it is very gingery, and not quite as oversweet as some other brands.