UK directory list

There are many directories out there, some paid some free. Here are a few of  free listings available to you. 

Some directories like you to place a link on your website if they agree to list yours. I wouldn't generally recommend this method as your website can become clogged with links and Google generally do not approve of such methods of link building. However some quality relevant directories are worth linking to.

Stay away from Paid listings as it is not considered a legitimate link building exercise by Google and you will eventually find it harms your rankings.

UK Directories

http://www.dmoz.org 

http://www.directorylisting.org

http://www.uksmallbusinessdirectory.co.uk

http://www.yourparish.co.uk 

http://www.wwwi.co.uk 

http://www.businessdirectorylistings.co.uk - Reciprical linking program

http://www.hotfrog.co.uk

http://www.uk-websitesdirectory.co.uk
http://www.ukdirectory.co.uk
http://www.jimac.co.uk
http://www.splut.com - Pay per click advertising program or Free listing
http://www.busybits.co.uk