This spider is about 15mm long (head& thorax) . It has a very clear white cross on its back
No interactions present.
Sometimes called the Garden Cross Spider, for obvious reasons.
A useful link below if you wish to know a little more about the species
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Lat/Lng: 51.1141, 0.0297
OS grid ref: TQ421369
This was photographed in the middle day on my easterly facing garage up and over door which is very sheltered from most winds.