Getting a job as an ATCO us extremly hard. Period.
If you want an easy route to a career, go find something else.
Of all the ways to get a job as an ATCO, NATS offer what is probably the easiest route.
You are paid to get your rating
You are paid to validate
You are guaranteed a job if you achieve the required standard
No other route is this straight forward but every route require a similar standard.
As the others have said, best route is NATS. If you are unsuccessful there (and they give you three bites at the cherry), then there are other options depending on how far you get. If you get a rating but fail to validate (as many do) then at least you've got that for free.