How often must Dangerous Goods training be refreshed?

There is no single refresh period for all Dangerous Goods qualifications. The interval depends on the role and transport mode:

ADR Vocational Training Certificate - Every 5 years, with refresher training and exams before the card expires. The refresher exam must be taken at least 2 weeks before expiry. GOV.UK

Dangerous Goods Safety Adviser certificate (UK: road, rail or inland waterways) -Every 5 years. Renewal exams must be passed during the certificate’s final year. GOV.UK

Air transport Dangerous Goods training - Recurrent training and assessment within 24 months of the previous training and assessment under ICAO rules. A country or operator may impose a shorter interval. ICAO

General road/rail staff and sea-freight shore staff - Periodic refresher training, but no universal fixed expiry period in the rules is given. Refresh it when regulations, duties or working practices change, and follow any applicable national or employer requirements. UK road/rail guidance, IMO maritime rules

For UK road and rail security-awareness training, Department for Transport guidance says to review the need for updates every 2 years and provide refresher training at intervals of no more than 5 years, more often if the risk assessment calls for it. That is guidance for security awareness, not a blanket five-year expiry for all staff training.

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