So wintering the the bike and noticed the steering the lock bolts were loose. On one side the lock nut was missing. On the other the bolt sheared as soon as I went to tighten the lock nut.
So I am looking for OEM parts 10/11 (x2) which I thinks are:
2 x Bolt (4MM Hex) - Part # 27850031A
2 x Nut (13MM) - Part # 41790304A
Will add accurate sizes when I dig out my digitalmeasurythingymajig!
Looking for OEM as I am a bit OCD but appreciate this is a really trivial search! 
Cheers, Kev.