[Jimbo2022]

As far as I understand it everything except BBC1 SD (SIDs 6411/6491) are frequency changes effectively

SID 6412 is the BBC2 sustaining service IE what BBC2 HD The rest are single services are can swap to new frequency.

So the national services will switch as well as BBC2. Wales and NI will eventually be switched (for SD viewers). Radio will also be moved over with a transponder change

For BBC1 I think what us meant to be happening is each region that launches once it's on EOG the SD feed will close for that region. At that point the region's that get HD regions will then get the BBC1 sustaining service in SD via SIDs 6411/6491.

The SD feeds stay until early 2024 on one mux. The rest if the BBC muxes are being changed one by one.

So there will be different dates for different regions and therefore there will be times when some SD regions still exist and sone that don't. So there will be a mixed bag at least fir a while.We just don't know the order the changes are happening in yet

Hope that helps