I can remember the two Canadians, Gordon and Manfred. I was helping Tracy Horsman run the London control when they arrived. One of them, can't remember which, had swollen knees and feet and wanted to pack. I spent about 20 minutes massaging his legs back to life and persuading him to carry on.
I also vaguely remember that they had some sort of early bike computers not seen in the UK before, showing distances and temperature, amongst other data. They might even have had tribars, but this needs confirmation.
I think the first rider into the control was Peter Coulson, closely followed by George Berwick and Mr Gray (can't remember his first name), but he was one of AUK's fastest riders at the time.