Looking practically at the airfield, and making use of Google Earth, I presume that two of the current Typhoon squadrons operate from the HAS sites and the other from the hardstanding adjacent to the control tower. Now, while I imagine a fourth operational Typhoon squadron could share that hardstanding and the OCU will presumably takeover the current Tornado OCU site, there seems a lack of room for a squadron of MPAs.
Unless they plan to shoehorn them into 202 Sqdn's now-vacant site
.
Either way, Lossie will surely have to have a lot of work to accommodate all that the MoD want to put there, and with the availability of space elsewhere I do wonder if the P-8s will go somewhere else.
Incidentally, and out of curiosity, where did 8 Sqdn have their operating area at Lossie?