Update.
Speed on youtube is now appalling,less than 300kbps (usually over 7000kbps),according to the "view video info" option,accessed by right clicking on the video.
Done speedtests,downloaded files - Streamed other videos off various sites.Iplayer,ITV,4OD,Demand5,IGN etc ...All play fine with zero buffering.Files downloading at full speed.
I have not been to work today.Been using youtube all day without issue - everything played instatly - until after 15:30.
Its either youtube or orange having serious issues - But i'm not seeing many reports anywhere about youtube - Ive read a few comments from Orange customers (on youtube).
i wonder if Orange's/EE's recent spat with google over bandwidth has anything to do with this?