150 Driver is right that here is not the best place to get financial/tax advice. It’s worth reading the actual legislation. It’s also worth reading the HMRC guidance, although keep an open mind because it sometimes reflects what they hoped the legislation said rather than what it does say. In this sort of case, accountants regularly offer differing views on their accountingweb forum, and their differing views represent both differing knowledge of the detail and differing approaches to business and HMRC in terms of boldness vs risk aversion.
The definition of work related training is actually considered to be quite wide by HMRC.
https://www.gov.uk/hmrc-internal-man...anual/eim01220
Ultimately your employer and their accountant need to agree the approach.
As a non-accountant I observe that we in the military trained people to drive cars, motor cycles, landrovers and trucks, and fly aircraft without it being considered BIK. And HMRC never did us any particular favours.