I believe this is a Walnut Orb Weaver Spider but not sure if this can be confused with other species? He (I think based on the palps that I could see) was resting on the ceiling of my bedroom last night and had moved to my window ledge this morning.
The abdomen is quite flattened but it doesn't seem as big as some of the images of the Walnut Orb Weaver Spider so I wasn't sure if this was one? The body size is approx 10mm
My location is BA12 0SS and sighting was today 30 July 14