wierd ?

[#1]

just been streaming BBC iplayer , and it stopped saying insufficient bandwidth   , fibre extra unlimited , 72 down & 17 up .  gateway ptw-ag02.
Iplayer diagnostic says connection is fine ? but i still get this twice now
program was Dive WWII: Our Secret History

[#2]

That old chestnut, Was common place with BE not unlimited , It has something to do with the CDN that you happen to connect to, Akamai and Limelight , Akamai is poor in contrast with limelight , as akamai  doesn't have or appear to have the resources it hasn't had them for a long time,  the max speed that it will download at is around 12mbps whilst limelight is 20mbps  My guess is that  akamai aren't providing as much bandwidth  or it becomes more saturated  than limelight does , you can check which cdn  you are using by toggling the console whilst iplayer is minimised

[#3]

Are you using google DNS by any chance?
I find that points me to more distant CDN servers.

[#4]

Well I just tried that file, and apart from a couple of 1 second pauses, which i think are related to the screen size vs streaming rate  ie 480/760/1500kbps it played fine (5mins) that i watched to test
to get the console to appear at the top right , you just right click and select it from the flash player menu,whilst the video is minimised , at least you will know which cdn the stream is originating from

[#5]

If you look at the service status ptw-ag02 went down on Friday 7 th

[#6]

cheers , i did manage to watch it by gateway hop 

[#7]

Funny this,
I had exactly the same trouble on a non Plusnet Fibre connection, did a BBC Speed test the second after it gave me the error, and said my download speed was 20Mbps....