as this subject comes up from time to time i have decided to build a list of uk web directories on my blog http://www.blog.1stchoicesearch.com/category/uk-web-directories/ if you own a uk directory check the list if you are not on please post your url here and i will add it
http://www.stiffupperlist.co.uk Also, http://directory.lincolnshireeye.co.uk - British, but limited to the county of Lincolnshire.