Sighting of a female Merlin in Garveston, Norfolk 25 Sep 2020

Yesterday my neighbour and myself witnessed a most spectacular sight - a raptor, which we identified through the RSPB website, as a female Merlin sitting on our boundary fence for some considerable time amid the bird feeding boxes. Presumably it had been blown off course because of the high winds and torrential rain coming from the north. I would be interested to hear whether this supposition is wrong and whether its not uncommon to see sightings of  Merlins in Breckland, Norfolk. A phone video was taken of the bird.