Three more ozone-layer depleting gases have been found by British scientists.
Researchers at the University of East Anglia have found two new types of chlorofluorocarbons (CFCs) and one new hydrochlorofluorocarbon (HCFC).
Research published in journal Atmosphere shows the scientists discovered the latest gases by comparing today's air samples with air collected between 1978 and 2012 in unpolluted Tasmania and samples taken during aircraft flights.
More top news
BA said the strikes will impact "only 1 per cent of our total scheduled flights across the three days."
It's another mild day in the north and west, but cold in the south and central England.
The singer, songwriter and rhythm guitarist for the British rock'n'roll band died on Christmas Eve aged 68.