To explore the feasibility and acceptability of a ‘spirometry trial’, we contacted 34 principal investigators on an ongoing asthma clinical trial (https://www.raaceno.co.uk/Public/Public/index.cshtml), asking ‘Would your centre be able to take part in a randomised controlled trial where patients would be randomised to treatment by spirometry plus symptoms versus symptoms only?’ There was a 100% response; 26 centres would be happy to recruit patients, but 8 centres would not recruit. (DGHC) Our cross-sectional survey gives insight into the inconsistency among clinicians of the role of spirometry in managing childhood asthma. Asthma outcomes for children and young people in the UK are poor relative to Europe,4 and there is a pressing need for the role of objective testing in asthma monitoring to be rigorously assessed.