In terms of the delay; the only reason for it is so we can get more people fully vaccinated and partially vaccinated. Currently, 83% of adults have had one dose and 57% have had both doses. By 19th July, it’s hoped that 94% of adults will have had one dose and 76% will have had both doses. It’s also hoped that all over-40s will be fully vaccinated and all adults will have been offered one dose by 19th July. We should be at about, or near to, herd immunity by this point, so our pharmaceutical defence will hopefully be strong enough to not require NPIs (non-pharmaceutical interventions) or at least not require the more obtrusive ones (e.g. social distancing, face masks).
It’s worth remembering what the scientists said at yesterday’s briefing; the only test not met was the risk of new variants threatening to derail our progress. This is simply because the effect of the Delta variant on our situation is presently unknown; we can see that cases are going up by a fair amount, but the scientists and the government are merely waiting to see what effect the case rise has on hospitalisations and deaths. There is a lag of a few weeks between cases and hospital admissions, so it remains to be seen what effect the current exponential case rise will have on hospitalisations and deaths. It’s currently looking fairly promising, as hospitalisations and deaths, although increasing, have remained fairly low and are increasing at a considerably slower rate than cases; they’re certainly not increasing at the rate they did at the start of the first and second waves, and they are actually still below SAGE’s original “best case scenario” for step 3 going ahead. However, the impact remains to be seen, and I think the government is merely trying to be cautious and see how the variant impacts hospital admissions before lifting the remaining restrictions.
Also, the government is rather interestingly now referring to 19th July as the “terminus date” for COVID restrictions, and not the “at the earliest” date like they referred to 21st June and the other roadmap stages. Boris has very much implied that we need to learn to live with COVID at some stage, as well as using the “terminus date” phrase, and Michael Gove has said that it would take an “unprecedented and remarkable change in circumstances” to derail the 19th July deadline for removing restrictions.