Check
For heavens sake don't dramatise! North Sea has been going so long everything is already covered countless times in the OM Parts A-D, nothing new - you just have to have the balls to stand up and make the decision, if it really bothers you; the manuals will always back you up. If you just want an easy life, or just please the radio op then .....
Everyone is asked to take an extra passenger, fly an extra route; everyone has underpowered helicopters! everyone encounters differing weather. You should be extremely grateful that the North Sea actually gives progressive training for all this so it should be no surprise when murphy shows his face - candy-arsed I've heard some call it - but that is only to get you to bite!
Have a thought for all those who don't have oodles of juice for alternates which you can easily demand when consulting the TAF - it's more difficult for you to go wrong than someone less regulated.
Yours,
another potential old fart!