All airlines are subject to wide-ranging international legislation and standards in relation to aircraft and flight safety, as well as crew fitness and competence from the International Civil Aviation Organisation (ICAO). They are also subject to relevant national legislation and standards in their country of origin. In the UK responsibility for standards of in-flight health and safety of flight and cabin crew and passenger health issues rests with the Civil Aviation Authority (CAA).
Both British and overseas carriers are subject to the requirements of the Health and Safety at Work etc Act 1974 when on the ground in airports in Great Britain. HSE investigates accidents, incidents and complaints at British airports in line with published policy and carries out inspections where there is clear evidence of poor performance. In addition HSE may carry out intelligence driven inspection of a poorly performing dutyholder. Where breaches of health and safety legislation are identified enforcement action is taken in line with the HSE enforcement policy.