Actually I bought a great open face helmet with full visor from Lidl a couple of years ago for around £25, admitedly it is a motorbike one, but I wouldn't trust my head to a £25 helmet on a bike, but for an open car it's perfect. I expect they'll be doing another special for motorcyclists in the spring. I also bought a superb one piece waterproof motorcycle suit for the same reason, can't remember the cost, but it wasn't a lot, maybe around £30 I think.
