I have a 4k LG tv which is fine and gets all channels. I have an 4 year older LG HD TV which if put on the same ariel connection does not get the channels listed below.

I have tried also with an old samsung digital tv and have the same problem .

The channels missing on both of the old tv's are :

82 Vintage Tv
94 PBS
101 - 105 Main HD channels ) (BBC 1&2, ITV, Channel 4, and Channel 5) in HD. They may be more but these are the ones that I have noticed.

If they are all ok on the new 4K it is obviously not the ariel. I have tried to do a over the air software update after a full factory reset on both to be told both have latest software fitted,

Any ideas ?

WAB