The Sultan of Brunei did indeed operate Wessex, one of which was bought by Bristow, and turned out to be the biggest jinx ever. It had Three accidents in its life, luckily with no major injuries.
The first was when being operated by Bristow in the far east, it had a tail rotor drive shaft failure, which resulted in a heavy landing and much damage.
It was shipped to Redhill where I was given the task of rebuilding it. It was then flown to Port Harcourt in Nigeria and registered as 5N-AJK. It operated there for a couple of years until it was turned over on take off as a result of ground resonance. ( one engineer standing on a pair of steps servicing another a/c had a rotor blade whistle past his head). It was rebuilt again, and operated for another year or so until its final demise in the Nigerian swamp due to a tail rotor servo sas motor failure.