Adding your site doesn't cost a thing. We would prefer it if you link to us, using one of our images, but don't insist upon it. To encourage you to link to us the ranking is calculated as follows:
(In Clicks x 3) + (Out Clicks x 2) = Rank
An In Click is when someone clicks a link to UKBest50 from your site
An Out Click is when someone clicks a link to your site from UKBEST50