Thanks for the feedback, the bike again after sitting idle for the weekend failed to start yesterday morning, opted for a push start worked like a bomb. This morning however it did the same thing, this time I just pushed enough to get one rotation if that of the crank (not attempting to start the bike, just attempting to move the crank). Then attempted to start normally, bike immediately fired up without any issue. Odd that this would help a battery issue, doubt a single rotation would change the charge of the battery.
I will check the battery voltage, alas when I need to get going I don't have time to pop the seat and grab a multimeter. Will check it tomorrow morning before attempting to start. The symptoms described by KiwiJeeper do sound very much the same, all that is left it so check the battery charge. Just odd the battery light doesn't feature - got ask what it's purpose/value is. Plus that a single rotation of the crank was enough to start the bike normally.