The Google Link Guideline has recently been updated and it says that businesses should avoid low quality links. But this statement refers to link directories and not business directories. CYLEX is not a low quality directory and it doesn't link company websites directly. A business directory listing does not affect neither your ranking nor your online reputation.
Online marketing consultants suggest that “online citations” and reviews do nothing but help the online presence of a company.
You can find more information about this matter here:
Here you can read about the low-quality directory or bookmark site links listed as unnatural links, but this does not refer to business directories as yell.com, 192.com, freeindex.co.uk or cylex-uk.co.uk
Check the list of the top UK business directories written by local search expert Phil Rozek: