Boris Johnson was today hit with a “blue wall” of opposition to inflicting draconian Tier 3 restrictions on London where the infection rate appears to be starting to fall more sharply. Eighteen boroughs, more than half of London, are now seeing falls in confirmed cases in the week to November 19, according to official figures. Infection rates are also heading towards Tier 1-type levels in a swathe of central London which is so economically crucial for Britain.