There are nowhere near enough players, fans, investors or media interest in London to support 3 KPC1 clubs. You'd be cannibalising Skolars and Hemel to create a third team and thereby re-creating the exact same problems we see in the north where too many small clubs are fighting over the same resources.
You don't grow by throwing money all over the shop, you focus your resources in a way that strengthens and builds upon what you've already got.
London has over 8 million people. If these people want to start a team in the South West as against Skolars in the north east and Broncos also north of the river and Hemel in the suburbs the more power to them. Over 8 million and a geographical area that is huge. It can flame and burn out or take hold and prosper. The game will either prosper ot maintain the status quo depending on which scenario plays out. It seems to be a no brainer to support the initiative and we will see where it leads.