Thanks everyone.
Have found the section in the IVA manual (web draft copy) and it refers to the front edge of the cycle wing must not be less than 30 degrees measured from the centre of the wheel, (1 o'clock in effect).
Will ponder on the various methods of attachment, Bigheads + cable ties, bonding or the bolts. Everbody seems to have their own opinions, and there does not seem to be a agreed preference overall.