The UK is pretty crap for Internet speeds and bandwidth caps/throttling to be honest. I was very happy with my 8Mbps/0.75Mbps (download/upload) ADSL connection with UK Online until Sky, like any overly-capitalist company would, bought them out and killed them. I moved to Virgin Media's 50Mbps/5Mbps fibre optic service and was plagued with nothing but bandwidth issues, specifically on my upload, killing all possibility of online gaming. Then there's the throttling...
Anyway, long story short, I cancelled before being tied to their crap service and found another holy grail ISP, "BE Broadband". I'm subscribed to their 24Mbps/2.5Mbps ADSL2+ service and I get 16Mbps/2Mbps steady speed all day long with no caps and no throttling. I'm very happy with this but I doubt this is classed as "high end broadband". The UK is very far behind what they should be at, to be honest. All we get is ISPs running the same crap networks selling us PR crap attached to capped/throttled products. Most of these "ISPs" also know nothing of Internet connections - they are just a regular company trying to milk the Internet cow with absolutely no technical knowledge beyond getting you "set up" (so they can start charging you).
"BE Broadband" has so far been one of those amazing ISPs, like UK Online was prior for me. I just hope it lasts. My friend in Japan is dreading moving back to the UK because of Internet connections over here compared to Japan. He currently gets 100Mbps download (not sure on upload but I believe it's 10Mbps), uncapped and unthrottled.