Slippage

There was I lying in bed first thing drinking my cup of tea when I heard what sounded like a sliding door being opened. Then silence. 'Hmmm' I thought. 'That sounds like a tile slipping down the roof.'
I could see no slipped tiles but the Head Gardener notices debris in a flower bed which lead me to spot the fallen dash on the chimney stack. I think that will be a scaffolding job.