That’s a bank of low cloud behind the houses. And it was a lovely evening, with the light turning red as the sun went down. Looking at the photo now, I wonder whether the streak of gold across the sky is the vapour trail from an aircraft? It could be because there was a flypast today to celebrate the 80th anniversary of the formation of the US Eighth Air Force.
Do you know this verse?
Red sky at night, shepherd’s delight. Red sky in the morning, shepherd’s warning.