Around 25% of hay fever sufferers in the UK are allergic to birch tree pollen. This means that for a good chunk of the population, the arrival of spring and summer means sneezing, itchy eyes, blocked sinuses and days spent indoors avoiding pollen. But the recent approval of a new drug could mean relief from these symptoms for thousands living in England with severe allergies to birch pollen.

Birch pollen is the most common allergy-causing tree pollen across most parts of Europe and the UK. Pollen from birch-related trees including alder, hazel, oak, hornbeam and beech trees can also trigger symptoms – ranging from coughing, congestion and sneezing to itchy, watery eyes.

Symptoms are usually at their peak in April and May, but can........

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