ht think this odd, but I wouldn't recommend any speed test as such. I would be more inclined to measure your download speed by downloading a file from a good server and taking note of the speed at which it downloads. Most browsers allow you to do this.
Thinkbroadband have their own at thinkbroadband download
Select their smallest file to download, in your case. You will get a good measure of the download rate after 10 seconds or so. You probably won't have to download the whole file.
Virgin Media: 100mb/10Mb , land line, mobiles x2, TV - VIP HD box + TIVO 1Tb box.