As a UK based user what is the best security software i can get i-e Anti-Virus and Firewall etc.

Any good free stuff

well, iptables for firewall.

Couple of our preferred choices:
http://www.webumake.com/free/mailscanner.htm
http://www.rfxnetworks.com/apf.php
http://modsecurity.org/
http://www.rootkit.nl/

yes you can use sawbuck links they are cool