Village of Old Coulsdon   
An AGP Website
Old Coulsdon.co.uk

Before we go any further I would like to clear up how the name Coulsdon is pronounced

The correct way to pronounce the name is " COLESDON" not "COOOLSDON"
My family have lived in the area since at least 1882, and it has always been pronounced as above, not as mentioned in Wikipedia
Also, this entry in the Bourne Society Local History Records Vol 55, Page 24 from an article by S.Franklin