I guess they will become a PPL school only now as the Commercial, IR and FIC is conducted at Cranfield and I doubt whether they (Cabair) will want to dilute their training base for advanced that close to home. To be successful at Booker they will have to be competitive with PPL rates and/or bring in diesels to remain competitive and make money. The Elstree base has seen a considerable fall of in PPL work, so perhaps they will relocate the locus of their London PPL work to Booker.
Whatever the outcome it will concentrate PPL and other training in the hands of a couple of schools so it will not do much for the competitiveness of the industry. I see more schools moving to the sport/recreational arena where is more money to be made at much lower costs that the Group A part of the industry.