NATS only very very rarely recruit "experienced controllers".
You would think that the largest ANSP in the country would consider employing qualified and experienced ATCOs, but that would obviously be too logical. NATS' policy is not to recruit experienced controllers - if in doubt, make contact and see what happens. You either get a borderline rude brush-off, or no reply at all. Those few who manage to sneak in clearly know someone in the right position...