Just purchased a series III lightweight and would like some help with some part numbers or help where I can find numbers?
They are all bonnet parts for spare wheel.
Centre U bolt thing that wheel fits over (sorry don't know proper names)
Strap to hold on wheel
three off (strap staples) that strap attaches to.
Mine also has rubber bonnet catches that hold it down but I'm guessing these have been added

Any help much appreciated, it may be cheaper just to get another bonnet!

See on amazon for the parts book. Costs between £14.50 and £20. It's useful in many ways.