They wont do anything until its too late. We all know they are incompetant and have stumbled through covid with reactionary rather then proactive policies.A new variant we will probably stop from coming here after it has colonised half the UK and then argue it was impossible to stop it or we would have done so.
We should at least be taking immediate action to quarantine and test all arriving from the known infected areas until we know enough to be sure of the risk. Hopefully we are. We were lucky with Delta.