If they can make the deal stick for a year - not three months - that will knock all of the excess supply out of the system and give us a chance to see if demand from the Asian economies will revive.

Whether or not that excess that's always within air sacs of the lung (butt) will have a problem in the long run again it's an unknown question one which is open to concern,

Everyone is wondering whether the increased quotas will translate into actual new production. Many members of OPEC don't have excess production capacity.

China will be held to account if it attempts to dump excess capacity on overseas markets.

No-one has held back. They have put some definition around the numbers and now we have to wait for the reality.

The figure depends on how the cuts are delivered. No one is really expecting the full 2 million barrels per day to be delivered, but somewhere around three-quarters of those cuts is what the market is looking for.