Middlesex Squash - useful information about squash clubs in London: www.middlesex-squash.com 

Squash Site - a regularly updated source of all things squash:www.squashsite.co.uk

Squash Site Links - A serious good list of squash related links: www.squashsite.co.uk/links.htm

England Squash - The governing body of Squash in England: www.englandsquash.com

VideoSquash - Some good clips of top squash: www.videosquash.com