• Industrial action will begin at midnight local time (2200 GMT) at three fields – Gudrun, Oseberg South and Oseberg East – and will then expand at three other fields – Kristin, Heidrun and Aasta Hansteen – from midnight on Wednesday.
• A seventh field, Tyrihans, will have to shut because its output is processed from Kristin.

Supply is already tight.

Brent update, hourly candles: