I'd pursue the NATS route if I were you at the moment. Most non-NATS units employ people as assistants first and then, once they've proved themselves, send them on ATCO courses. With an Aerodrome course alone costing in the region of £19K they are very wary about sponsoring anyone. The only college apart from Bournemouth which is UK approved is Shearwater training at Cwmbran at the moment, with another one hopefully becoming UK approved (just outside Bath) in the near future.
CM