Blooms have flourished during the warm spell but they pose a health risk to humans and animals.
Horsefly bites are painful and can lead to a skin infection that may require antibiotics, say doctors.
Cherelle Farrugia, 25, breaks out in a painful rash every time she comes into contact with water.
Dr Andrew Bastawrous has invented an app that has been shown in clinical trials to help more children see clearly.
It is the first time a long-term license for the use of the drug is granted in the UK under the new panel system.