Does it really matter how we got there anymore?
The strategy, a gamble, paid off, and we've vaccinated (fully) a lot of people and a lot of people have got their first doses.
This is good
They took the decision, seemingly for a few reasons: as explained by Whitty initially, the idea was that it was better to have more people with the a fair chunk of protection (initially thought to be around 70-80% but actually turned out to be nearer 90%) sooner, than less people as much protection as possible. In turn, that was clearly so that we could, in theory, open up again sooner and as such stop the strain of lockdowns on society, the economy etc, while simultaneously saving lives.
France not quite going for 12 weeks, but now pushing four to six between doses following the U.K. logic.
France extends gap between Covid-19 vaccine shots
France will lengthen the period between the first and second shots of Covid-19 vaccines to six weeks from four weeks as of 14 April to accelerate the inoculation campaign, the country's health minister has said.

