Channel 4 are currently changing and swapping their channels around on satellite.

Presumably this is in preparation to moving all their channels to frequencies that only HD receivers can use.

As part of these changes, the single Channel 4 SD version has changed frequencies.

C4SD used to be located on 10714 H 22000 5/6.

C4SD is now currently on 11126 V 22000 5/6, the same frequency as C4HD London is on.

Note that if you are using a Sky HD, or Freesat HD receiver, then any frequency changes made to channel will automatically be updated for you.

If you are using any other type of satellite receiver, then most of these will not automatically update, so you will have to manually scan for the channels should you wish to continue to watch them.

Channel 4 Satellite frequencies can be found here.