tonight i had a eureka moment and after 5 minutes work the loose heat shield has gone
i had a bolt off a childs scooter that had quick release fittings ,the attached picture shows part of the quick release fitting.
remove a heat shield bolt and replace it with whats in the picture,
tighten the bolt up and the lip on the washer presses on the insert in the heat shield and clamps the insert to the shield.
jobs done