UK TV streaming ad-blocking

With NEXTDNS setup... if I go onto a UK TV channel and try to stream using MS Edge it comes up with Ad-blocker in place and won't play. I've tested to make sure it's not Edge or Bitdefender - the only solution being to use my ISPs DNS - where they work perfectly.

How can I tweek NEXTDNS to allow these channels to play? I've tried adding the domain to the allowed list eg www.channel4.com or www.channel5.com - but this doesn't solve the issue.