GWO has agreed to allow as a temporary measure until 1 June 2020 that:
Course participants unable to refresh previous training within the 24 month validity period due to COVID 19, may be able to take their planned refresher training up until 60 days after expiry. However, if, during the period of your current certification you have not worked in a wind turbine environment or used the skills you learned on GWO courses, the risk of skills fade is very high. This option should be assessed by the legal duty holder responsible for your safety on site.