LGW/STN No1 Lounge entrance for £12

Today only through Groupon - £12 per person. Buy now and use any time up until end of the year. Doesn't seem a bad price - cheaper even than booking crappy Servisair IIRC?

http://www.groupon.co.uk/deals/london-s ... ign=Varies

Only valid for Stansted & Gatwick, and entry at Gatwick lounge only after 11am