Seems like good news but there are a number of things here that are being either downplayed or outright ignored that make me more concerned about this vaccine than the pfizer one.
Firstly, the whole 90% effective rate is still being bandied around when from the news I have seen, we are getting the dosage level that was only 62% effective.
Secondly, we are now getting these two doses 12 weeks apart when what was tested was two doses 4 weeks apart. How have they suddenly decided that this is OK when this was not what was tested (or at least no data has been released for it)?
Thirdly, they seem to be suggesting that one dose gives some protection (presumably substantial given the way they are talking about it) - where is the evidence for that?
It's hard to tell if this is just really poor communication from the government and Oxford Vaccine group (with a new media that seems fairly happy not to look too closely themselves) or that the government is so desperate for a solution to this problem that they are rushing ahead, getting creative with things and hoping for the best.
Anything that is safe (which both vaccines certainly appear to be) and gives any protection is a good thing, but this looks increasingly like a push to persuade everyone that everything will soon be OK and we can all go back to school and work without worrying when the facts don't actually suggest that's the case.
Not only that, it feeds peoples' thinking that they can ignore the current lockdown restrictions as the super-effective vaccines will be here soon, so 'why bother'. Boris' desperate desire to be the bearer of good knews while skirting around inconvenient facts is normally just irritating - here though it's actively dangerous.