Phone no longer unlocks watch
I've had an Apple Watch since July - it's always worked perfectly. From day one I've always been able to unlock the watch using the phone. I got a new iPhone 6S a few weeks ago, also no problems. Paired the phone, everything worked, unlocks, heart rate, everything.
Starting two a couple ago (after updating to 2.0.1) the watch stopped unlocking when the phone was unlocked.
I've tried rebooting both devices (multiple times and at the same time). I also unpaired the watch from the phone and re-paired it. This fixed the problem for a couple of days, but starting yesterday it no longer unlocks again.
I've also found the watch has started randomly locking itself - which basically renders it useless as I no longer get notifications.
Any ideas before a revert to not wearing a watch again?