To add my bit to this discussion flying VMC or IMC. Flying VMC is MC conditions where you can fly using your eyes, Flying IMC is where MC conditions are such that you have to fly on instruments. That has nothing to do with VFR or IFR which are a set of rules.
A Glider with minimal cloud flying instrumentation and No nav equiptment can be flying in IMC but not to IFR while as we know an aircraft can be flying IFR in VMC conditions.
I would go further it is theoretically possible for a experienced pilot to fly who knows the area really well with good line features to fly VMC with a 300 foot cloudbase and 600 metre vis.
I left Le touquet on an IFR departure hearing a piper cub routing up the coast in those conditions to the UK. The vis and cloudbase picked up halfway across the channel.
So one pilots VMC may not be another pilots VMC. Yes he was in that portion of the flight breaking VFR.
Pace