Are you suggesting that the ancients who first designed Tesco's roofs had greater plans than merely keeping the ancient shoppers dry on a wet day? Whooa! That's made me re-evaluate a few things, I can tell you...
In the 70s, the old Tesco building had a hole in the roof that, at certain times, you could probably see the sun through.
AND their 4 bottles of beer for a fiver deals aren't to be sniffed at, either! (Other supermarkets are available)
G x