Alas, I don't have a Waitrose local to home, and the closest one to me doesn't stock it; I passed by on a ride yesterday and stuck my head in to check :(
I do actually need to drop some stuff off at the office at some point, so might try and combine that with a beer run...
yes! its great, fizzy on the tongue and quite liquorice (but in a good way)
edit: definitely in my local Waitrose, for most of the last year I'd say.