As far as I know North Sea oil and gas crew-changes don't involve NH90s. S-92, S-76, AW139 and Dauphin II seem to be the chariots of choice. Although the heli' operators still have EC Super Pumas in inventory they've largely been banned from using them for O&G by the offshore operators.
As far as I'm aware neither Bond, CHC or Bristow even have NH90s on their books.
There are no civil NH90s. There are never likely to be.
It is not even offered on the civil market.