Morning thank you for the replies , the glue i used was the "high temp stuff" but i can only assume the weight of the sound deadening was to much for it . Have been to Martrim in Sandbach this morning and bought more glue "not the spray on type" so will try that , have decided not to use any more sound deadening as the exhaust is now changed!
If anybody is looking for a supplier of the alloy strip that runs along the top of the door have a look at the following
http://www.blackburnsmetals.com/prod...ings-cope.html , many thanks to Bob(Hurnleft) for the info , Geoff .