Yes it is a little reminiscent of Lucozade Hamish. Many diet drinks don't taste the same as the sugared varieties - Coke doesn't either.

I guess if you are not used to "pop" that many such drinks will not be to your palate.

Glass bottled "pop" seems to have gone the way of the dinosaur alas. I remember that every bottle was sold with a deposit of about 3d (that's the old real money) which was refunded when you took the empty bottle back. That encouraged enterprise and recycling instead of the casual throwaway culture we now have with anti social people throwing the plastic ones away in the street.

But I really am surprised that such a big Tesco carried such a poor choice!