Its a bit before my time, but to buy meths in Scotland you used to have to sign a register. But that's a wee while ago now...
The trouble with the mineralised meths available in the uk is that the minerals (whatever they are) clog up a Trangia's burner holes.
I used to buy denatured alcohol (without minerals) from a chemical suppliers, the type of place that supplies university's. But now a friend brings it over from France: the stuff pongs but doesn't have minerals in it. The best meths ever was Swiss (typical, eh): it burned beatifully, didn't smell auful and was relatively cheap. It was hard to find in Spain.
I've always fancied making proper wood alcohol, but its pretty nasty stuff so not sure about handling it or using it to cook food from.
Just rambling,
y0dsa