Thanks EEPhil (and also thanks to Luke).That is a question for the BBC.
Fortunately with an 1800T should you want to save the programmes you can find information within these forums.
It's pinned at the top of this forum section: https://hummy.tv/forum/threads/downloading-decrypted-recordings-to-pc-including-hidef.5379/You mentioned saving the programmes? I'm only aware of 2 such methods for the 1800T: either save to USB drive, or download using upnp-inspector+wget. My understanding is that neither of these works if the file is marked by the 1800T as encrypted.
But Freeview is not the same as Freesat and the metadata is not necessarily the same between different platforms.The BBC R3 prom concert broadcast last night (29th Aug 18-20:30) was marked as 'Enc' by my Humax 1800T, but NOT by my Humax FoxSat HDR
It's already known about by the people who need to know about it.Has anyone here contacted Freeview about such issues?