article_snippet.sent: Meanwhile the Department for Environment, Food & Rural Affairs has issued a warning to asthma sufferers of 'very high' air pollution tomorrow.
article_snippet.sent: Experts said locally-emitted pollution that would normally blow away will become trapped to the ground for longer, because there will be little wind.
article_snippet.sent: A Defra spokesman stressed the high pollution is not a direct result of the warm weather, but a mixture of factors including the arrival of Saharan dust.
article_snippet.sent: Defra has warned of high (in red) and very high (in purple) pollution  later this week.
article_snippet.sent: Air pollution levels tomorrow are forecast to be ‘very high’ in the far South East of England - potentially putting asthma sufferers at risk.
article_snippet.sent: Defra said that conditions will see 'locally-emitted pollution become trapped to the ground, because there's not so much wind'.
article_snippet.sent: A spokesman told MailOnline: 'Basically MailOnline've seen local pollution and it's a mixture of that with some air coming in from the continent and a little bit of Saharan dust.
highlights_snippet.sent: Defra warns asthma sufferers and people with lung problems of 'very high' air pollution in South East tomorrow .