I'd take a look at the IVA manual:
http://www.minimag.co.uk/files/2011/...l-May-09-1.pdf
I've had a brief look, and can't see anything that says that the wheels must be attached by more than one fixing...
But it does mention this:
Quote:
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Originally Posted by page 120 of the IVA manual
14. The upper half of a wheel must not protrude beyond the body plan form section. (disregarding tyres, wheel discs, and central wheel securing nuts).
15. Any wheel disc or central wheel securing nut that project beyond the body holes or sections without body panels fitted, all parts that are
plan form must have a radius of curvature of at least 30mm, and cannot accessible with a 100mm sphere from the exterior of the vehicle are
project from the plan form by more than 30mm
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I'd take this to say that center lock spinners are fine, so long as they don't project pass the body work more than 30mm - but that's my personal opinion and not VOSA's. To be completly sure, you could give Mark Vickers from VOSA Swansea a ring on 01792 454 354. He should be able to confirm one way or the other.
Cheers
GOO