| Sounds like the dreaded duff oil pressure switch again. It lives just behind the oil filler. They're notorious for giving up the ghost and giving you an oil warning light when you don't actually have a problem.
There are loads of threads about this so a search might do the trick. If you have good oil levels and you've done 60 hard miles it would've blown up by now if you had a real oil pressure problem
I went through this last year and ended up doing about 5-600 miles with the oil light blazing until Nelly sorted it out at a service | 
Jools
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