Fareastdriver,
I'm sure you're correct but the RAF's HC1 aircraft already in squadron service were modified / retrofitted 'post Salamanca' despite CAA Perf. A / Class 1 never having been an RAF requirement.
To be honest, I don't think the HC1 could comply with many CAA requirements even after 36 years in service, certainly not Perf. A. For example, in my three tours I considered having only one fire bottle between two engines a bit sparse in the peace of mind stakes, or a single tail rotor control cable breakage resulting in a servo runaway to full travel, not much of a luxury. Not to mention those 'uncrashworthy seats' over which the UK press found a shock horror story in the mid 80s. Good thing they never saw that Boscombe Handling Squadron report about the lack of engine response and tendency to suffer yaw roll divergence etc
