Blair seems to be of the opinion (reading between the lines) that the media negativity towards then Oxford / AZ vaccine has influenced the MHRA to be especially thorough. He might well be right.
Anyway, it was estimated the Oxford / AZ vaccine would get the go ahead around the 28th December. Hopefully, that happens whilst maintaining the independence of the MHRA. That’s important because we already know, for example, they only 57% of people in BAME communities are willing to take the vaccine(s). I’ve seen different figures for survey results across the population (maybe three quarters willing to be vaccinated). There isn’t a lot of wiggle room for risking those figures slipping further eg if vaccine clearance was seen as a political decision.
Btw, it could be embarrassing for the Government if the Oxford / AZ vaccine was cleared first by the EMA.