Sometimes Highlands and Islands Airports Ltd take direct entrants and put them through an Aerodrome and Approach ( non radar )course.
https://hialcareers.co.uk/jobs.
There are no vacancies at the moment, this however is quite an extreme way to go because you have to be able to cope with a remote island posting which is a completely different mindset. I did three years on an island airport and it was good fun. I did however have the safety net of being seconded from NATS/CAA at the time and knew I was probably going back to Scottish Centre after my tour.
HIAL is now a separate company and recruit their own ATCO's.
Inverness is the company HQ and Inverness Airport has Radar, however it would be very unlikely you would ever get that as a first posting.
I must reiterate that due to the locations of these airfields the vacancies when they arise will not suit everyone!
Rgds
AyrTC