You had yours a year after me, I seem to have a similar length of time after surgery as mine touched 0.1 over a year ago before dropping a bit and now up to 0.11. I have a retest and consultant appointment in January, my Onco says leave it until 0.2. he has previously said treat at 0.1 but I think recent research has changed it to the more conservative approach.
This approach was confirmed by a second option at the Royal Marston (wait until 0.2).