What sort of places would sell... compressed air?

[Le_Petit_Lapin]

....a tin of compressed air?

Need to grab one on the way home tonight, and my head is drawing a blank on what places would stock them. Would B&Q (that's not a competitor is it?) have it?

 

[Le_Petit_Lapin]

or deep breath, purse lips, close eyes, blow like you've never blown before job done.

Tried that already!

Thanks for the help, off to get some now. Feel a bit thick at some of the answers, I should have thought of them myself. One of those days eh?