I think the £10 million investment was all about attracting back the SCS service to LSI.
You're right, oil business is always mentioned whenever the airport manager talks about the extention. It's pretty poor that LSI got grants from all sorts of public bodies with the aim of out-doing it's only real rival.
Hopefully Scatsta will maintain a helicopter operation in some fashion. I doubt Bristows or any other company could hope to get as focused a service from anywhere else. Scatsta is there to operate and serve the Pumas almost exclusively.