Well I waited for those better than me to reply but-- this is a bit of a "hot potato" 26 websites have been taken out by ISPS at the command of big companies and others --as you say blocked. This is ongoing more will follow . Now that I have said that I am sure you will get many replies. If there is another answer then I too would like to know?
Thanks for the reply duncan10.
I knew others had been taken down but multiupload had been OK since the latest "purge", at least, it was a couple of days ago. I just noticed today that, although you can get to http://www.multiupload.nl/ to upload files you can't get to http://www.multiupload.nl/anythingaftertheforwardslash to download them again.
I know in the past that BT has made a mess of its white/blacklists and blocked whole domains when only a sub-domain should have been blocked and was hoping that would be the case here.