There are plenty of these and similar signs from BA and HA:L up. There are also a lot of new red hand sanitiser boxes installed on the walls, including by security.
General view of Departures. Quiet but not empty.
Not many departures, but note the new destination, to IOM on a Loganair turbo prop. This is the combined T3 and T5 flight schedule for a Sunday afternoon and evening.
This sign is outside the lounges and Concorde Room.
I still got the usual BA customer service survey, but maybe it is a sanity checker: