If they come up with strong announcements about the agreed cuts it could easily see $1 to $1.50 added to the price [of a barrel of oil].

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.

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