Discrimination against British People
This has nothing at all to do with the United Kingdoms relationship with Europe.
This is straightforward discrimination by foreign companies against British workers seeking work in Britain with British qualifications.
Nothing at all to do with Europe just straightforward ugly racial national discrimination.
That it is sanctioned by a European Agency EASA aided and supported by the weak CAA makes the betrayal of the British worker more likely to provoke a vigorous back lash.
Any airline that employees pilots in the United Kingdom and who refuses to employ British licensed pilots should face an immediate boycott.