Norwich Airport is part of the Strasser Scheme.
When did they join? The Strasser scheme says:
Unfortunately
10 Airports/Airfields have so far decided that they will not implement the CAP 667 9.2(c) recommendations. Hopefully they will have a change of heart and join the majority of UK airfields that have.
Belfast-Intl., Biggin-Hill, Birmingham, Cardiff, Carlisle, Filton, Leeds/Bradford, London-Luton, Manchester, Norwich
ZA