It is true that in the past the practice of operating on someone elses AOC has taken place but under CAA regulations now the practice has been virtually wiped out.
You will find it is not so much the operational side as the financial requirement that kills it. There was a way round it by using an ATOL licence but this was stopped.
Unless things have changed in the last eighteen months or so you will find it pretty much impossible to make this kind of arrangement.
My advice ( from first hand experience) is find another way of getting your airline started.