Warning sign

Tier 5 - Day 42

I kept a diary during the first lockdown and the subject of the Downing Street Briefing on Day 42 was the Contact and Trace App being trialled on the Isle of Wight! New infections were 3985 and deaths were 288.
(Today's are 9765 and 230 respectively.)

On today's walk I came across this sign fixed to a front garden wall.