Each G20 leader can speak for just under 14 minutes

Same Coates has the details of the agenda for the G20:

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 the meeting lasts 4 hours 35 minutes.  My estimate was 3 to 4 hours.

The cost of the submit is £50m.  So each 14 minute leader slot costs £2.5m.

Value for money for the hard pressed British taxpayer.