Dr Hilary Jones regularly appears on daytime TV shows such as This Morning, and on Wednesday he joined Christine Lampard on Lorraine.
Christine is standing in for Lorraine Kelly while she enjoys a summer break. Dr Hilary was in the studio to discuss the latest health news, and he had a stark warning for asthma sufferers.
It comes amid a serious turn in the weather. Following the heatwave earlier this month, a combination of high pollen counts and the current wet weather is set to create a phenomenon known as "thunder fever" or "thunderstorm asthma".
