A couple of you Brits ought to get together and split the $25 shipping from the US and order a half-dozen 16oz bottles. Barbicide is about $6 per 16oz bottle here on various barber supply websites.
Since it was suggested that a couple of you get together and order a half dozen 16 oz. bottles, I just wanted to make sure that everyone realizes that the material in the bottle, as you purchase it, is concentrated. You mix two oz. of the concentrate into a quart of water.
Obviously, a half dozen bottles of the material would make a lot of solution as you would actually use it.
Just wanted to be sure that people were aware of this.