I think this should be investigated  TBH  .    Whatever anyone tells you ,   you can't learn a trade at college .  You can learn  the basics  ,  you can learn the Regs ,  you could pass ALL the exams in the world  but I'd like to bet if the college lecturers  or a load of Oxford Dons with every degree in the universe turned up on a new building project ,  say a railway station , a new school ,  a medium sized factory  ....they would not have a Scooby Doo  in the practicalities .  Â
You have to be there , putting the time in , watching , learning , soaking it up ,  with other sparks  , other plumbers , other car mechanics ,  heating engineers , carpenters , bricklayers , drain layers . Â
This Forum has many skilled , intelligent  tradesmen ,  but I'd bet if we all got together to lay some drains  on a new housing site ,say ,  we'd make right cock up of them .
And these four week courses are ripping off honest guys  who are willing to find work  , but have been misled . Â
 Its mis-selling on a grand scale.Â