"Normal protocols" would be a fairly rugged set of risk assessments, work up, safety procedures, crew training... I've no idea if this was in place or not.
Would it be fitted with an ADR? I don't know anything about Malaysian regulations, but in the UK it would be regarded as good practice but not legally mandatory. Ditto telemetry.
Would AAIB be interested? Almost certainly not - it had no British registration and any lessons learned are unlikely to impact upon flight safety in the UK fleet.
I am rather curious as to why a UK company would choose to conduct flight testing in an obscure corner of Malaysia? There's a lot of flight test infrastructure and expertise in the UK, but it's not something for which the Malays are particularly known.
G