That makes sense.
It's also possible that Battersea, being in one single location, is easier to secure. In contrast, it appears that the Kensington campus has separate buildings a few streets apart for the Lower and Preparatory schools, plus an annexe with some additional facilities also a few streets away from the other two buildings.
In the Kensington location, they'd have to prep* the Lower School building, then do additional work to prep the Prep School building, and then have RPOs covering both buildings while George has moved on to Prep School but Charlotte is still in the Lower School.
*by prep, I mean everything from creating security and evacuation plans up to any physical modifications they may make to the building.
It's also possible that Battersea, being in one single location, is easier to secure. In contrast, it appears that the Kensington campus has separate buildings a few streets apart for the Lower and Preparatory schools, plus an annexe with some additional facilities also a few streets away from the other two buildings.
In the Kensington location, they'd have to prep* the Lower School building, then do additional work to prep the Prep School building, and then have RPOs covering both buildings while George has moved on to Prep School but Charlotte is still in the Lower School.
*by prep, I mean everything from creating security and evacuation plans up to any physical modifications they may make to the building.