I remember this operation in Aberdeen, but never saw the machine up close - I seem to recall it was painted white (but I may be completely wrong about that). They were away from the main operations and the machine rarely flew by all accounts. Some of the people I know who worked there are still in the industry today, so might be better informed.
The 330G had metal blades and limited performance. The operation closed and everything went away, I really can't contribute any information beyond that. The 330J that followed into service had a very succesful North Sea career before moving elsewhere in the world as the 332 replaced it.