Franko - you're in Livingston I see. I work for THUS (we own Demon). I'm pretty sure we've unbundled Livingston exchanges so we may have ADSL2+ in your area (up to 16mb down and 2mb Assured rate up). Might be worth looking into? I know you got a good deal with Sky but if you need more maybe you just bite the bullet and see if it's available? If we've unbundled the exchange that you're on you would be on a THUS / C&W DSLAM with very little or no contention.
Also - if you don't want to go down that route - the one thing that might be able to speed your connection up is an iPlate. Ideal for folk (like me) who are at the end of the copper from the exchange. Upped my DL from 2mb to 3.8mb and my UL from 325 to 768kb. It's dependant on the phone socket you have but very much worth a look given it's only just over a fiver. Since I put mine in - I've had months at a time of stability instead of the days I used to get.
http://www.broadbandbuyer.co.uk/Shop/ShopDetail.asp?ProductID=7256 Cheers
John
