Patients will be targeted for recruitment when they present with symptoms or signs relating to poorly controlled asthma to the nominated GPs or Practice nurses. Questionnaire data will be collected from a baseline cohort, until 20 datasets per practice (16) have accrued (320 in total). Questionnaire data will then be collected from 20 patients per practice presenting in the same circumstances to the nominated GPs and Practice nurses in the intervention practices (160 in total). Questionnaire data will also be collected from 20 patients per practice presenting in the same circumstances to the nominated GPs and Practice nurses in the control practices, who will deliver care as usual (160 in total). The post training cohorts (control and intervention) will have follow up questionnaires at 3 and 12 months after the index consultation. Routinely available data will be collected for all patients with evidence of poorly controlled asthma before and after training. A total of 320 patients (160 to each arm) from a total of 16 practices (ie. 20 patients per practice) will ensure 90% power in the baseline and post-intervention cohorts at the 5% significance level (randomisation is by practice so this sample size calculation was inflated to correct for the intracluster correlation coefficient (ICC)) .