I think we are forgetting our recent history.
the Brexit didn’t affect the numbers until late 2018 I would say, but it would continue the downward trend already established at that time.
starting in late 2015 the oil price was collapsing; people will were being laid off and the puma fleet was grounded and people started to leave the industry, and as their Medicals run out the licence numbers start to reduce.
this is the bulk of the reduction i think 🤔