I have been using anchorfree. As you expected, it hasn’t been brilliant, the bandwidth is noticeably less, so watching a full show is impractical due to a 10 sec buffering period every 30-45 sec. But the clips work fine even if the vid quality drops down and I usually prefer the clips anyway.
I will try that config change. I can’t use iplayer when anchorfree is connected (as, obviously, iplayer thinks I’m in the USA) but it’s really easy to turn on and off. If the changing of those settings upsets iplayer then anchorfree is the best workaround.
On the brighter side, it has been really nice being able to watch SNL.