The Braer grounding prompted an increase in emergency cover but recent cutbacks have left one emergency tug for the whole of Scotland.

BBC: Braer oil spill: Warning 20 years after Shetland disaster

The grounding of all non-emergency flights from England's airports - which began on Thursday morning - will remain in place until at least 0100 BST on Monday as the plume continues to drift across Britain.

BBC: Flight ban 'not over-reacting' say Wiltshire scientists

The ANA plane was forced to make an emergency landing, and that led to the grounding of all Dreamliners in operation.

BBC: Boeing 787 Dreamliner: NTSB details battery fire