BP upped its provision for litigation and claims costs stemming from the 2010 Gulf of Mexico oil spill by $1.1bn (£724m) last year, bringing its estimate of total litigation and claims costs relating to the incident to $26.8bn (£17.7bn).

In an earnings update issued yesterday (3 February), the oil giant said it had upped its estimate of litigation and claims costs by $435m (£287.5m) in the fourth quarter of last year.