Now that a majority have had first doses it already is focused on second doses.
Now that 72% of BCers over 12 have had a first dose, there isn't that many eligible people left to give first doses.
Oxford is now recommending 12 weeks for maximum effectiveness from AZ. We still don't know about the other vaccines because US companies don't seem to want to do studies on extending the interval. Bad for business, they don't sell as much if they do.