[interestednovice]

Again, sorry to ask and be the one who constantly asks questions. For the uninitiated what is a "dirty feed"? As I said, sorry to be a pain.

I think a dirty feed is piggybacking off the feed that's going straight to air, where you have to work around existing presentation and CAs in the hope you'll get a clean transition to the programme you're going to show. I'm sure someone with more expertise than myself will explain it better.

Again, sorry to ask and be the one who constantly asks questions. For the uninitiated what is a "dirty feed"? As I said, sorry to be a pain.

I think a dirty feed is piggybacking off the feed that's going straight to air, where you have to work around existing presentation and CAs in the hope you'll get a clean transition to the programme you're going to show. I'm sure someone with more expertise than myself will explain it better.

The thing is Salford is not set up as a region  - which simply “opts out” of the network feed from London. Instead, Salford is part of the BBC’s disaster recovery scenario - so it is actually a second playout which runs separately and in parallel to the “network” London feed. Therefore, it is more akin to a second network feed, and is set up that way on purpose in case London has issues and has to cut to Salford’s feed.

Due to this, it will not be routine to “put the London feed” on air, although perhaps they should regularly do it for this Question Time live preview!

It requires some extra thinking, since BBC One North has not been created as a new service but as a way of making better use of existing DR infrastructure.

I believe that’s a simple explanation of what is going on, anyway. Someone who works at the BBC may understand in more detail.