The only thing on the crossbar - might get stuck in the first zombie and delaying the attack on the next one?
I was trying to think of other things the Brits could use. Someone mentioned wasp spray - the 15-20 foot long spray kind. Another one might be a wrist rocket or even a homemade slingshot. Getting hit with a ballbearing might be enough of a deterrent to some punk just wanting free stuff.
I should have been clearer. I mean one of those fittings that allows four pipes to meet. Like a T but with four openings. They aren't real common, but they have several nice edges.
I love the wasp spray! And the slingshot!
Water gun with bleach or some other eye irritant. But then they would have to steal some new clothes to replace the damaged stolen ones they already have.
Paintball guns are relatively tame, but one in the face or eye will turn a dude around real fast. Or put him down for a while. I wonder if they are legal in the UK.