One of these should do it>>>
Web Proxies from UNITED KINGDOM - UK Web Proxy list
or there's this>>>
Visit HideIP's website and download their trial version of HideIP Platinum. Once installed, keep changing the IPs until you get a UK IP.
Most of the time, this technique should work. HideIP instructions can be found on their site.
Remember to jot down the UK IP address and its port number though because the next time you'll run the HideIP Platinum program (after closing it), it'll automatically change the IP.
OR
if you are geeky, install
Tor: anonymity online and configure it to use IPs from the UK range.