Cash from significant project will help UK oil company reduce debt

Analysts say Ankara would relish the chance to extend its influence in the turbulent region

Moscow wants more access to the Turkish market, but Ankara is suspicious of dependence on Russia

Traders have built up short positions and may yet force cartel to make bigger cuts

Chopper shuttle services tap high-end market after demand from offshore platforms falls

$13bn deal will give oil producer strong foothold in fast-growing Indian market

Drop in Brent benchmark deepens as traders lose faith in Opec supply cuts

Shares in the Austrian group have risen sharply on turnround strategy

Green groups condemn plans to exploit Barents Sea area thought to hold 18bn barrels

British Gas owner looks to focus on services and smaller, flexible electricity plants

Swedish group to use deal for iSupplyEnergy as springboard for assault on ‘big 6’

Brent crude down 20 per cent from its most recent high in early January

Shutdown set to leave Britain more dependent on imports and exposed to price shocks