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More and more children at Rebecca Stewart's east London playgroup are using asthma inhalers, she says.

Another local tells me her asthma is so bad she has been given an inhaler that is usually for people with COPD, and yet she has never smoked.

One of those students, Lexi, who has asthma, said she always carries her inhalers with her, especially if she knows she'll be playing sport.

Despite the severe symptoms, the lawsuit alleges Tong was instructed to use an inhaler.

“I had to use an inhaler in Delhi. But since I have moved here, I don’t even remember where it is,” he says.