IS
Also I believe that the decision to do such a thing isn't one that can be made by the production team/region and there's the added complication that the coding operation isn't done by the BBC. It's not a case of someone in Bristol just phoning up and asking for it to be switched over
The process of routing another region to output is done remotely and can be arranged over the phone in such circumstances. However if there's the chance things could be fixed I imagine the Points West team would have decided to have stuck with not-opting and taking London, thinking they might be able to opt for one of the later slots. It's also a new(ish) thing and staff on shift might not be fully aware it's an option,
Also I believe that the decision to do such a thing isn't one that can be made by the production team/region and there's the added complication that the coding operation isn't done by the BBC. It's not a case of someone in Bristol just phoning up and asking for it to be switched over