In fact, the clouds, known as the 'lesser-spotted mammatus' – appeared as a lobe and were packed full of ice and rain. According to local forecasters, the clouds created a large thunderstorm which drenched much of Britain over the weekend. The clouds are associated with the powerful storms which can sometimes occur in the summer and are a sign of massive quantities of water vapour.
Phil Spencer, a 39-year-old truck driver from Telford, was left baffled by the sudden change in the weather. He said: “I went to Morrisons and looked up and noticed all these weird and wonderful shapes in the sky. It was only there for five or 10 minutes and then just literally went as quickly as it came in.” –Express UK