This letter provides information regarding NHS England’s approach to pre-action self-assessment and reporting of workforce and rescheduled activity impacts of the industrial action announced by the British Medical Association (BMA) and Hospital Consultants and Specialists Association (HCSA) junior doctors and British Dental Association (BDA) dental trainees from 7:00 am on Friday 11 August – 7:00 am Tuesday 15 August. It also sets out the approach for action by consultant members of the BMA and BDA consultants from 7:00 am on Thursday 24 August – 7:00 am Saturday 26 August 2023.