Thanks for your reply and that certainly was my understanding about the issue of permits/C of As. One manufacturer I spoke to was interpreting the new 472 kg limit running like" Well sir you're a fairly large chap (true) but if we leave out the ballistic parachute you'll still have enough payload for the memsaab and full fuel, so off you go" . Possibly that's why the CAA/PFA think lip-service is being paid to the rules.
But why the mind-set over 450kg. Would raising it to 500kgs bring the world to an end. Of course not. It's a daft rule and needs to be re-thought.