It's been mentioned a number of times by Kate Bingham, the government and their advisors about the not the whole population. This is also blindingly obvious from statements the government has made about securing vaccines.
This comment is more worrying as it suggests the government have made their mind up and the evidence on how effective vaccines (plural) are is very much unsettled (the government may have some info about how particular ones seem to be doing).
Short of further research about the immune system and interferons and particular antibodies/auto-antibodies as mentioned recently with a mass test, it is going to be difficult to decide who has it, but there is a lot of data for the government to make an informed choice.
When the time comes the government will have to be open and honest about who gets the vaccine and why and it's drawbacks.
E.g. completely made up numbers. But for some of the vaccines the profile may be something like
over 85s protects 30% of patients
65-84 protects 50% of patients
50-64 protects 65% of patients
40-49 protects 85% of patients
18-39 protects 90% of patients, another 9% register no symptoms and are less infectious
and then it'll depend on treatments available at the time and what vaccines are available at what time. It's not infeasible that one of the first available vaccines is terrible at protecting older patients but fantastic in younger patients. What do you do then?
Rather stupidly it may have to be rowed back upon as with around 20 million more than just those very at risk it may be decided say it's a good idea vaccinating first year university students or people that live in very high density housing.
You're right it has just not in the mass media you get to point of shutting down at times when government and their advisors get going.
I don't see much either being talked about just what issues will come when a vaccine has come along. Or who get's what and when some unpopular clinically lead choices will have to be made. Just talking up how good trials are going is not going to help anyone. A open public debate needs to start now. Some may well not work from the start or months down the line it's not going to be a perfect golden egg.
Going what's popular won't help at some point equal weight will have to go to once at risk and ones who pose the biggest risk to other.
Social need will have to come into play at some point which won't sit nicely with some.
Get the stuff into arm will be massive task and will not happen quickly. Again government is not being open about it and admitting it's not going to be easy or quick to get. Just the admin will take a massive effort under normal conditions.
As for the jabs Mrs 73 can do about 50 jabs an hour normally. With all the covid conditions even setting up a queue is not easy then add in the PPE That 50 rate soon drops she thinks to about less than 1/2 if she's lucky. That's assuming everyone is able to get have it and leave and no-one need's to have a few minutes to rest up.