top sites for finding .uk owners
http://thephonebook.bt.com - search for owner or business name
http://wck2.companieshouse.gov.uk - (search by name of company or company number)
http://yasni.co.uk ( if very limited info on who is try this site searchs for internet profiles with this name)
http://archive.org -(waybackmachine)( view historic archives of the site - sometimes get lucky with number listed on the site)