For a second I thought the movement on the bike was due to the wind but only for a second! If you think something's wrong it usually is! I was doing approx 60-65mph on dual carriageway so fast enough and so quickly dropped down to a halt. Sure enough the front was flat but managed to continue to off the road. Put it on centre stand and checked for a nail or something. Nothing. When trying to inflate it, it sounds like it's coming from area of valve. Wasn't in a position to do anymore so got it to garage and await to find out what is the cause of the puncture. Bit strange but does highlight the whole tube/tubeless debate and either way I think I'm lucky it wasn't a worse outcome.