Some of which may be commercial i.e. they want your cash, we endorse no products & are sponsored by none. Just the content can be useful!
Other running Clubs
Colchester & Tendring Athletics club
Triathlon clubs
Events sites
Race the train.... www.racethetrain.co.uk
Ballycotton web page www.ballycottonrunning.com
The official London Marathon web site
Charity event in london http://www.british10k.org
http://www.british10krunslondon.org
Running related sites
Want to find a track or contact other clubs? UK Running Track Directory
Runnerscircle... A free accommodation site for runners wanting to travel to running events around the world!
For anything running try 
On Running... the new web backed by Peter Elliot
More sports... http://www.sports2find.com
South of England Athletics Association
Worldwide....www.worldwiderunning.com
Time to run? www.time-to-run.com/britain
www.fit4thefuture.eu - Training camp in France with some of the biggest names in UK coaching
Useful sites
Click here for Harwich on the web
Need to find directions to an event... Try 
Get Kids going (president Sebastian Coe OBE), a charity that gives disabled children the opportunity of all sports.
Sri Chinmoy http://www.aboutsrichinmoy.com/