Counter-measures: use a VPN service IN CONJUCTION WITH OBFSPROXY (OPENVPN+OBFSPROXY).
Can Capita's Deep Packet Inspection (DPI) 'technology' tell the difference between say a livestream from BBC News24, as opposed to, for instance livestream from Youtube, or RT.com, aljazeera.com?
What if you have four or five windows open, and stream from several different websites SIMULTANEOUSLY? Would this muddy the waters?
Even if their 'technology' can differentiate between various livestreams, effective counter-measures exist by using a VPN service IN CONJUCTION WITH OBFSPROXY (OPENVPN+OBFSPROXY).
Several VPN service providers allow this, and such techniques are successful used by millions who reside in even nastier regimes than our own in the UK, such as Iran, China, Pakistan.
Mullvad, NordVPN, Proxy.sh, VPN.AC, are just a small example of the many providers who now provide OPENVPN+OBFSPROXY technology.
Continue to bin the letters, and use a VPN service which has a track record of defeating the Great Firewall of China (one which uses TOR's obfs technology), and continue to use the BBC iplayer (Live or not).
((It may also possible to use STUNNEL in conjunction with a VPN service to defeat DPI)).
At the end of the day the [B]lantantly [B]iased [C]orporation will continue to rely on the same old nasty letters, littered with the phrases such as 'Interview Under Caution' and 'Police And Criminal Evidence' Act, thrown in, to fool the stupid into mistakenly believing that the TV enforcement staff have 'Police Powers'.
Whilst those with a half a brain know it's safe to continue to bin the letters, and shut the door in the face of any inspector who does pay a visit.