We left the allotment at about 17:30 on Sunday afternoon. It had been a dull and chilly afternoon even for late September. However, in the hour or so before we left the cloud cleared and the cool breeze disappeared as it became quite calm.  If conditions remained the same, it had all the feelings of a cold night to come.

As it turns out they did, leading to the coldest September night in the last eleven years with the temperature falling to 2.5°C or 36.5°F.