Hello all, thought that i would give an update.
Took the car to a few garages including Mini Sytner, would all didn't know what was wrong and said they would have to do an engine dynanostic. However, i as the car stopped showing the faults after 2 days i thought that i would drive it for a while to see if anything happened. The car has been fine.
My conclusion (hopefully correct!) is that a sensor got wet or something similar, as it was chucking it down when the fault happened. And now that it's dried out the fault has gone away.
Dont know too much about sensors and electrical parts in a car, but does this sound like a probable conclusion???