Downing Street has said that it would be "an unprecedented step" for Britain to pursue legal action against Spain in the dispute over the overseas territory of Gibraltar.
More top news
Proposal would see a task force set up to assess environmental impact from breaches of emissions testing rules.
Hundreds remain missing in what is becoming one of the worst natural disasters to hit Central America in recent years.
Medical charity worker relates how he and colleagues tried to save patients and staff following devastating air strike.