They will never be able to say all of any group have had their jab. There are always those who turn it down or are terribly slow to book and need chasing again a and again. After July, there will be people in every group still being chased up.
When they said they’d met the Grouos 1-4 target in Feb, there were and still are people who haven’t been jabbed within them. All you can say and do is OFFER.
Given the national booking site has allowed all over 50s to book since mid March and all have been eligible, the target has been met already in England. Some will have refused it and some might have booked and not had their appointment yet (although those will be low as they weren’t oozing on the national site after 29 March) and some might only now be trying to book and finding difficulty due to low supply, which they wouldn’t have had if booking 3 weeks ago, but all have had that opportunity.
I don’t think they will say target met until 15 April. Once they say that, people will want to know about official roll out to under 50s and because of low supply, they will need to control the rollout very carefully and no point starting it sooner than they actually can.
Probably people in England will also post to say they haven’t had their jab after 15 April. It will turn out many simply didn’t book when eligible as hoped for more local appointment, or have only tried since supply dwindled despite being eligible 3 weeks ago. There are still people posting on MN saying their 65 year old relative hasn’t been jabbed and it’s a disgrace.....but usually they have been offered it multiple times.