I can get my 10mb from easynews with 4 or 5 connections generally.
I've been considering Giganews because they have a good name and also a euro server, but the speed test for them is very bad on NTL from about 12pm onwards here, which is amazing being as it only needs to go to Amsterdam, looks like more poor peering at NTL
http://www.giganews.com/test_connect.html
Gives 10mb or almost so early in the morning and late at night, but the rest of the time its lucky to go above 1 mb...could be the proxies I guess.