UKC Auctions Surplus Banner Impressions is auctioning off surplus banner impressions for June 02. This is a great opportunity to advertise on UK?s busiest climbing site for as little as £35 (rate card £350). There are 30,000 impressions available. An ?impression? is each time a banner is shown. UKC serves in excess of 1 million page impressions a month, and has around 50,000 visitors a month.