Found this "secret page" completely by accident on UK2.net -- http://www.uk2.net/secret_link/
Does not have an expiry date or any other terms/conditions unlike other codes. Check it out if you don't believe me! Covers domain names, hosting, servers, etc.
Gives the following info:
We told you not to click the link didn't we?
Well now that you are here we'll let you in on a secret - this is a special offer page that only a few people know about and since we like to reward curiosity here's a voucher code that'll give you £5 off your next UK2 order.
Just enter the voucher code 'secretfive' when you checkout and receive £5 off your order.
We do have a few rules:
Don't tell anyone else