Programme follows approval of vaccinations for 12- to 15-year-olds and is aimed at heading off winter rise in infections
Boris Johnson is to confirm the start of a booster jabs programme for the over-50s on Tuesday after government scientists finally approved vaccinations for older schoolchildren.
Setting out a widespread acceleration of the vaccine programme before what ministers concede will be a difficult second winter coping with the virus, the prime minister will also signal his opposition to any further lockdowns this year.