Sub 5C before 10pm only concerned me as there was little wind to speak of; the crystal-clear, starlit sky spoke of dry air when I went out but I was hoping the tenders in the garden would be spared a frost, as such fresh winds were expected. No ice on the car roofs yet, but in this sheltered spot, I expect trouble...
Bertie, Itchen Valley.
Retire while you can still press the 'retire now' button.