When I tried to view a football match listed on the TNT Sports website by clicking on the listing on the events page ('What's On TNT Sports'), I received the error message EP101, followed by 'Access Denied. Client address not authorised', followed by my I.P. address. I was using my normal laptop, and I was in the U.K. Oddly, I could watch the channels as normal on the website, but not access the match through this method. This is annoying because if you watch via the events page, this normally lets you watch from the start if you arrive late.
Thank you for the tip. Up to now I have been using the old BT/TNT Sports website, which is about to be removed. I have recently tried the Discovery+ website, and I have found it very good, as long as you use Google Chrome. The rewind option for live television seems to work well.