engine oil pressure light coming on, and then off

[tomlinscote]

Had mine from new (2004) and Sunday morning I was about 1 mile into my journey home, about 500 miles from my folks when the oil light came on, bugger I thought (!) but as the bike warmed up it went off and later on I looked at the glass and the level was halfway between the marks which is not enough for the sensor, as the bike is due its annual oil change I reckon its not bad usage, 200ml or so for r5k miles. Though it has never needed a top up between services before.......
At least its not a GS needing a litre or so per 1000 miles!!