I would imagine these courses, which can cost upto £750 ($925 USD) each from NPL, are free until the end of June. The general ones look of interest to anyone interested in metrology. The specialist courses are not voltage or time related. The general one will take 5 days to complete them all. Most/all have NPL certificates of completion, which might be useful to anyone applying for chartered/professional engineering status. https://www.npl.co.uk/skills-learning/free-e-learning?utm_campaign=Free-elearning&utm_source=Email&utm_medium=Database&utm_content=Customers&utm_medium=email&utm_term=&utm_content=Find%20out%20more&utm_source=Free+e-learning+courses+stage+2+May20&utm_campaign=Free+e-learning+courses+stage+2+May20 -- Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@kirkbymicrowave.co.uk https://www.kirkbymicrowave.co.uk/ Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom