https://assets.publishing.service.go...iant_DELTA.pdf
Notably it was published last night and not 22 February as the news article you linked to. The news article predates the emergence of variant delta.
It confirms a reduction in vaccine efficacy which is being denied and highlights particular concern around the Oxford vaccine.
There is more confidence after two doses.
It's very red as far as risk registers go. It would be very challenging for a
following the science Conservative Government to ignore.