CA,
I had a similar problem in January with a problem eventualy diagnosed as Vestibular Neuronitis.
On reporting the condition to the CAA I received a letter revoking the Privileges of my licence' until signed fit to fly by an AME.
After a two week period the symptoms had gone away.
I then informed the AME who notified the CAA. The Caa have now asked for a two moth period clear of symptoms before returning the Privileges of my licence'.
NTB.