http://www.cable.co.uk/news/virgin-m...ows-801597336/
"Virgin Media has created a new algorithm that measures live, catch-up, on-demand and recorded TV viewing along with chatter on social networks to identify the UK's most-discussed television shows.
Dubbed The Hotlist, the ranking takes into account three methods of interaction - viewing a programme, engaging with it socially and talking about it enthusiastically after it's been on."