A presidential adviser says the oil giant is could still receive profits from its stake in Russia's Rosneft.

President Putin has for years warned Russia's richest to protect themselves against sanctions.

Reputational risk and practical difficulties means the exodus of firms is growing but some remain.

Norwegian energy giant Equinor also says it will start to divest its joint ventures in Russia.

The oil giant's boss is warned of UK government concerns about its "overexposure to Russian interests".