[Dougal]

I'm not entirely sure why you'd think it might be on BBC One.  It's not as if the PM was announcing an election, or announcing something of immediate public importance. (Yes, the climate is of public importance but doesn't require them to take immediate action.)

It's unusual for a Prime Minister to call a press conference. Put to one side the daily press conferences during the pandemic and consider a moment the circumstances in which one would expect to hear from a Prime Minister. One could argue that last year, having dismissed a Chancellor of the Exchequer, a press conference by the Prime Minister should have been on BBC One.

By that standard, today's press conference - arranged at the last minute in response to economic, political and societal criticism - could, should and did warrant being broadcast on BBC One. Irrespective of one's views on the issues at hand, they were voted upon in a plebiscite and the HM Government has decided unilaterally to jettison the relevant policies.

A press conference called by the Prime Minister is rare. A press conference called at the last minute is rarer still.