How the UAE’s decision to leave Opec could recast the Middle East

Defection is damaging to Saudi Arabia's prestige - and could strengthen the US hand in the region

The United Arab Emirates' decision to walk out of Opec is a political as much as business decision, and will reignite the simmering rows between the UAE and Saudi Arabia - which had been covered up by their shared anger with Iran over its attacks on the Gulf states since the start of the US-Israel war on Tehran.

In the short term, leaving the oil producing cartel it joined in 1967 gives the UAE the freedom to respond quickly to a long-term prospect of constrained supplies, and to maximise profit. But it is a decision the UAE has considered before, as UAE and Saudi tensions over production quotas have been longstanding.