[Stooky Bill]

The “network” feed was always derived from BBC One London anyway, so it is not surprising in a way.

Not really sure what you mean

The England HD version of BBC One is a seperate variant to BBC One London and both are different to the 'network' version of BBC One. 

The latter carries some London news bulletins but is not derived from it, London opt out of it. 

The UK wide SD service 'nightlight' is essentially the same as the soon to be discontinued HD England, just with a different caption wording