Chances of zone transit if you call them 'Stansted Approach' on initial call: Zero, zilch, nada.
Hadnt thought of that when I have called them Essex Radar in the past:
Next time they pee me off I am going to tell them that I am qsy ing to Stansted approach to see if I have any better luck with them
.
Mind you they rarely seem to be able to read back my aircraft type correctly so whats in a name eh.