Apart from being told to why would the Navy want to leave Sultan?
It is:
In fairly good order
Near the sea and ships (ethos)
Near Collingwood where the rest of the RN trains
Hosts the AIB and CAMB
Has loads of space
Linked to Fareham College etc
Runs apprenticeship schemes
Has a great open day
Why did they want to go to St Athan:
They didn't.
Why would they want to go to Lyneham:
They don't.