Tennents Super made with the finest highland spring water from, er.... Luton, Bedfordshire
Apparently the extra-strength "Tennents Super" brand is now entirely unrelated to the rest of Tennents and manufactured in Luton (i.e. England) because Tennents' former owner kept the rights to it when they sold the rest of the company on.
Guess that's the one they liked most down there, whatever that says about them(!)