Dutch Bike

^ The valves are Woods valves. Most track pumps come with a little brass adaptor to bring them up to Shraeder size. They are a great design because you don't need to unscrew anything to pump them up - the little one-way valve inside keep the air from escaping.
Ah, thanks. I didn't get an adaptor with mine, or if I did, I lost it (far more likely). 75p from cycleworld.co.uk. Job done.

I did find out what the one way thingy was, because I unscrewed it, thinking it was like the lock thingy on a presta valve, and nearly lost an eye when it came flying out with 40psi of air behind it. I found it, and reinflated the tyre ok. It's just a small pair of rubber flaps, held shut by air pressure inside the tube, and forced open when you pump air through it.

Dynamo is now randomly ceasing to function. Not wiring, I don't think... hmmmm...