Here are a number of links you may find useful:

Down Syndrome Association 
The down syndrome association is the main UK charity covering all aspects of living successfully with down syndrome.

The Down Syndrome Educational Trust
This site is to help people with down syndrome achieve more in all areas of their development, by informing you of progress through research and education.

Down's Heart Group 
A charity offering support and information relating to heart conditions associated with Down's Syndrome

Down Syndrome Research Foundation
Detailed and researched based information about Down's Syndrome

Stevenage Dolphins
A swimming club, founded in 1962, for anyone with a physical or mental disability. The club meets at Stevenage Swimming Pool every Sunday at 4 pm.

If you have found a website or any resource you found useful why not tell us about it and we will put it up here as well.  Please send it to Links@UpOnDowns.co.uk