The hour or sandglass measures Time, so symbolically represents the transience of life. It was often used from the early 17thC in vanitas paintings in the Netherlands. Look carefully and various heads from the card images themselves are caught inside the hour glasses.
A new slogan ‘Stay Alert’ was introduced by the govt which proved vague and confusing. Dominic Cummings, a pivotal force in the Brexit vote was the PM’s senior adviser. He made the very regrettable decision to go to his parental home in Durham during Lockdown when it was prohibited. This fact and his reasoning did huge damage to the credibility of the govt when so many had had terrible separations from loved ones abiding by govt legislation.