Public Health England issued data to support the move. As Politico notes Politico notes on the findings;
The Pfizer jab is 96 percent effective against hospitalization after two doses; AstraZeneca is 92 percent effective against hospitalization after two doses.
The same source also notes straightforwardly contradictory findings from Scotland:
The Delta variant carries about double the risk of hospitalization compared with the Alpha variant first identified in the U.K., according to research from Scotland released Monday
Only one of the findings of these two pieces of research is going to be close to the truth, so different are they. And we do not know as yet, although I have remarkably little confidence in the objectivity of Public Health England at present, so skewed has their data reporting been.
Well, no actually, from his own source:
Unlike the Scottish data, the PHE data was focused on preventing serious illness needing hospital admission. The Scottish analysis of vaccine efficacy was based on preventing all infections in the community, including mild cases.
There is no contradiction between those two studies nor pieces of information.