I've seen the ISS pass over me from SW London for the last three nights - it's unmistakeable as a bright slow moving 'star' travelling west to east at dusk. Some excellent telescopic pics taken from Europe up on SpaceWeather.com currently and precise 'pass' predictions for your location at Heaven-Above.com [select 'UK' and enter your town].
The ISS currently has the Shuttle spececraft attached and they've installed new solar panels but a telescope is needed to view them
My wideangle pics from last night attached
ISS will be viewable at dusk, I think, for the rest of the week.