Lossiemouth is to become the UK and Norwegian P8 main training and maintenance base - hence the need for a 3 aircraft maintenance hangar (aircraft not undergoing maintenance will be kept outside on the line, just like in the MR2 days) and a full mission flight simulator. It will also be the main P8 logistics centre this side of the pond, and will be see a lot more USN P8 'visitors'. That is the reason that Boeing are putting so much into the project, they are getting the money from more than just the UK procurement.