Apologies if this has already been discussed.
Asda now sell asthma reliever inhalers (salbutamol) over the counter, 2 for £7 and no more than 2 every 8 weeks.
I think it's a great idea as I've lost mine or used it up without being organised enough to put in a new prescription and wait 48 hours to pick it up.
Subject to a quick consultation with a pharmacist and many big asda pharmacy dept open til 10pm.
I don't work for asda btw 
Asda Inhalers