Any C# solutions i tried failed on this url - http://www.streetmap.co.uk/newmap.srf?x=529725&y=182411&z=0&sv=WC1H%2B0BX&st=2&pc=WC1H%2B0BX&mapp=newmap.srf&searchp=newsearch.srf.
Because of '&' character. Is there any C# code that handles such urls in correct way?
UPD. Here is the solution