Thanks all for your replies!
I had a PET 2 weeks ago after rise in PSA to 1.4 the scan showed cancer in a single lymph node.
The Oncologist believes my "Hormone Holiday" is over hence he intends to put me on HT permanently hence my question about what's everyone's experience and thoughts of how long HT lasts before castrate resistance?
However I realise my Profile is confusing so I'll re-jig it and come back online in a while with the question.
Thanks again all!