Always found these High PR Directory Listing Sites as niche. Get your Backlinks now. Always remember one thing that you should not multiple links in one directory. Submit only one link per directory in relevant category. It will safe from spamming.
Following reference websites will help you in this regards:
www.118.com
www.192.com
www.applegate.co.uk
www.bizbuzz.com
www.bizwiki.co.uk
www.brownbook.net
www.businesslinedirectory.com
www.city-listings.co.uk
www.cylex-uk.co.uk
www.enteruk.co.uk
www.freebd.co.uk
www.hotfrog.co.uk
www.linkedin.com
www.localdatasearch.com
www.look-trade.co.uk
www.opendi.co.uk
www.pinbud.co.uk
www.qype.co.uk
www.scoot.co.uk
www.touchlocal.com
www.uk-local-search.co.uk
www.yalwa.co.uk
www.yell.com
www.yelp.co.uk
