New EU cookie law (e-Privacy Directive):http://www.ico.gov.uk/for_organisations/privacy_and_electronic_communications/the_guide/cookies.aspx
“Many people are not aware of it yet, but the law is already in effect in the UK. However The Information Commissioners’ Office (ICO), the UK regulator, gave everybody a one year ‘grace period’ before they start enforcing it.
That grace period will expire on May 26th 2012.
From that date, if you are not compliant or visibly working towards compliance, you run the risk of enforcement action, which can include a fine of up to half a million pounds for a serious breach.” - source: http://www.cookielaw.org/the-cookie-law-explained.aspx