Non-NATS Airports down south
Down south there are a few airports which are independently run and that occassionally take on 'ab initios'.
As mentioned previously, Manston is run by the Infratil group so the Kent International Airport website would be the one to go to.
Lydd (London Ashford...) is run privately and has previously taken on several ATSA/FISO's and trained them up, provided they were willing to be 'bonded' to the company for a period of time.
Shoreham is also privately run, and whilst it was having a difficult time earlier in the year, it is so busy it is unlikely to close.
All websites worth having a look at
Hope that helps - Britkit