Hopeful! If ever there was a 'commercially sensitive' arrangement, it would be that between ITV Studios and BBC Studioworks.
Two things, about your question, though
1) Are ITV paying the BBC for useage, lock, stock and lighting grid for year round residency of TC2 and TC3 as a whole self contained deal - or are they paying the rent on the use per sq foot/mtr on the floorspace of the standing sets in TC's 2 &3?
2) You'd think, that this deal renting out two studios is a heck of a lot cheaper in the long run, than finding a empty or existing space to convert central London location and building, and fitting out 2 or 3 broadcast spec studios in it.
My user name might look like Hatton Cross, but it's pronounced Throatwobbler Mangrove.