Luke
Well-Knwοn Мember
Any one retuning a generic DTT receiver will see it. The freeview epg data does not yet include an LCN for either channel (SD and HD) and therefore a freeview device should ignore it on retuning until sometime on Wednesday 26th, when the LCNs are expected to be included.So anyone retuning will see it, or do you need to do something special?
You could try using the CLONE option of tunefix-update (example at https://hummy.tv/forum/threads/channel-5-hd.7107/page-6#post-97111), or write your own instructions possibly based on https://hummy.tv/forum/threads/channel-5-hd.7107/#post-96460 .
For BBC THREE HD, most of the needed details that differ from BBC ONE HD can be obtained from https://www.digitalbitrate.com/dtv.php?lang=en&liste=1&live=9&mux=BBCB-PSB3&nav=mux