A reminder of the timeline of events in the Gulf of Mexico oil spill:
- 20 April 2010: Explosion and fire on Deepwater Horizon rig kills 11 workers and injures 17. The rig is owned by Transocean Ltd and licensed to BP.
- 22 April: Rig capsizes and sinks, leading oil to discharge through the gulf.
- 30 April: Then BP boss Tony Hayward says company accepts responsibility for the spill and promises to compensate all those affected.
- 22 June: After receiving criticism for his handling of the crisis - including comment he would like his life back - Hayward hands day-to-day reponsibility for spill operations to Managing Director BOB Dudley - later named as next CEO.
- 29 September - BP permanently seals the leaking well.
BP claims 3.26 million barrels leaked from the well in total, while the US government puts the spillage at around 4.9 million barrels.
More top news
No EU national currently living lawfully in the UK will be made to leave on the day of Brexit under proposals outlined by Theresa May.
A revolutionary cancer-fighting machine will deliver proton beam therapy for the first time in the UK.
Low pressure brings cooler, more seasonal weather over the next few days.