http://www.londonsummit.gov.uk/en/summit-aims/faqs/general-questions/summit-costsand you can be sure it'll be more than that.
and this is what we get for it...
Gordon's save the world summit next Thursday is going to be awfully short.
Leaders' breakfast 8.30am - 9.45am
Morning session including finance ministers and central bankers 9.50am- 1.25pm
Lunch 1.25pm - 2.30pm
Afternoon session including finance ministers and central bankers 2.30pm to 3.30pm
Closing press conferences, 3.30 onwards
So it's 4 hours and 35 minutes of formal talks plus time spent chatting over three meals (including Downing Street dinner the night before). And the British taxpayer gets not much change from £20 million quid for the pleasure. Bretton Woods, when international institutions were last re-made, lasted three weeks.
http://timesonline.typepad.com/politics/2009/03/the-london-summ.html