Its all about the latency of the stream when sending it a long distance and there's very little you can do outside of upgrading your upload speed at the slingbox location, but as I've found out, you've got to be realistic even with a 5mb upload connection like mine and my U.K slingbox is even 3000 miles further west than yours. You can play around with the encoding settings on the slingbox desktop software or try to get someone to play around with the MTU settings on your router in the U.K, but in order to get that .18 of a mb back, it'll require more hassle than it's worth and you might not be any better off. Best bet is to upgrade your upload speeds in the U.K. I've noticed anytime you do one of those speedtest.net speed checks from the location you're slinging to, the numbers don't always accurately reflect your own slingbox stream due to how the process works. The reality is there are a lot of factors for the slingbox to take into consideration when it sends you that stream therefore a speed test isn''t a true representation of your streaming numbers.