Honest,
As has been pointed out on many occasions you will have very little say or influence about your initial career/posting. NATS will decide if you will be Area streamed ( Prestwick Centre or Swanwick ) or Aerodrome streamed ( Aberdeen, Aberporth Range, Belfast, Bristol, Cardiff, Farnborough, Gibraltar, Glasgow, London ( Heathrow, City, Luton and Stansted ), Manchester, Southampton and TC at Swanwick ).
You may also find that your initial training will be in Cheltenham or even Jerez in Spain.
As you have intimated you have probably answered your own question.
Having just written the above I have just found this link to NATS latest social media dabbling and it is quite accurate!
https://spark.adobe.com/page/1hXpXos...NATS%20Careers
Rgds
AyrTC