several bits of history you are attempting to rewrite here
I never claimed to have those powers.
You're entitled to give your interpretation too, as a mumsnetter (although you address that with the passion of a political campaigner). While all these recent school developments haven't affected your children directly (not at secondary level), because they went to private schools and are now grown up, I follow developments because my teenager is still in the local state system and will be directly affected by new MAT arrangements.
I'm just not interested in resurrecting the RISC debate from the past, although where I revisit arguments, it's with the hindsight of knowing stuff now - and more about the actors in that debate - that I didn't before. BayJay argued for a Catholic academy in her original post. If it really wasn't something she was seriously proposing (at a time when only one site appeared to be available), it turned out to be a non-starter (straw man argument?) as dioceses wouldn't have backed it. This was one of the many interesting points made at an October 2011 Education Committee debate where Jeremy Rodell of RISC also spoke.
I always believed the council was justified in arguing that if a new community school opened too early, it would impact surrounding comprehensives - that has proved true so far with Turing House, as documented in the LST annual report stating the impact on Hampton Academy this year, being about 30 pupils down. It affects budgets, teaching staff, morale, and in consequence also the schools that are involved in the new MAT, one of which is also involved in the RTS school. But long term things may look very different as HA has new management, and its permanent site has never been in question.