Daniel is 13 years old and was diagnosed with Asthma at his previous GP practice. His mum says he has always just had to use Salbutamol mainly when he gets a bad cold. However, he has had to use his inhaler several times a week after sport over the last school term, and has night time symptoms once a week.
Respiratory examination and observations are normal today.
What is the single most appropriate next step in his management?