Hurricane Ophelia is to blame, they said and debris from forest fires in Portugal and Spain also played a part. And now an analysis of tiny particles has indeed confirmed that the dust blown over from the Sahara by the remnants of Ophelia is what had caused this phenomenon.
So, while Mum was editing today's photo she came across the Sahara filter from an app on her computer and this is what she got.
And here is a song called Sahara from Mum's favourite band, Nightwish.