Please keep in mind when booking the BSI standard BS5306-3:2017 recommendations regarding refresher course training which state: “It might not be possible to adhere precisely to a 3 year period, but this is acceptable provided that the refresher training has been officially booked before the 3-year anniversary and the course completed within 6 months of the 3-year anniversary. Failure to follow this procedure entails completing the initial training again.”