I thought it would be of interest to those who'd like to use LED lights in PBP 2007.
I'm quoting from the AudaxUK mailing list:
latest batch of PBP docs for translation from ACP includes the regulations.
The lighting rules require permanently attached and serviceable front and rear lighting
powerful enough to be visible from a distance of 100m in front and 150m in the rear.
Flashing rear lights are banned.
You're recommended to have a backup lighting system.
That's more or less it. No reference to spare bulbs or specific restrictions on LED lights.
I guess that's not the end of it.