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.
Their are 2 pans either side of the Tower, that were occupied by at one stage 2 Flights of 12 OCU Jaguars and their is another large pan adjacent to where the Tornado OCU currently operate from and the old 202 pan is a decent size to. Their is also the lazy runway which was regularly used to park aircraft on back in the day and may still happen.
Finding space to park the P-8's up for the evening is the easy bit me thinks, furnishing them with the super duper hangar and brand new Squadron HQ they will no doubt require may be the hard bit.