The entire story makes no sense - at least as you've explained it, and probably as they did?.
They mention standard low power DVB channels, there are currently a couple of low power multiplexes on a very few transmitters only - and the low power drastically reduces their range. However, these are only temporary, only available to a small part of the UK, and will disappear as 5G coverage progresses.
IF any pay broadcasters wanted to use such a highly limited system, they would certainly encrypt the signal in order to ensure their payment.
The UK is VERY, VERY strict about copyright and piracy, the only such systems I've heard of were in Spain etc. where they transmitted pirated British TV programmes using microwave transmitters as a fee paying service, using microwave receivers to connect to the TV's. This was relatively short lived, as the Spanish Police eventually took action, and broke up the piracy ring.
The entire sounds unlikely, more likely would be yet another Firestick type device, where you watch TV via the Internet, but again any copyright infringements are soon shut down.