Everyone aged 34 or above in England can now book a Covid-19 vaccine through the NHS website as the jabs rollout is extended.
More than 70 per cent of British adults have now had at least one vaccine dose, with almost 40 per cent getting their second too.
If the current pace of vaccination can be sustained, the rollout will be substantially complete at the end of next month.
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In England, everyone aged 34 and 35 is now eligible and can expect a text message inviting them to book an appointment on Thursday or Friday.
The age limit has been moving downwards every two or three days, suggesting the remaining 30-somethings will be called up next week with people in their 20s following in June.
All over-18s are eligible to get vaccinated in Wales, whose rollout has been moving more quickly than any other part of the UK. Over-25s can book in Northern Ireland, while Scotland is currently trying to complete the over-40 group except in Glasgow where all adults are being offered a jab in order to try and control the citys Covid-19 outbreak.
Health Secretary Matt Hancock said: Our vaccination programme the fastest and most successful in NHS history moves forward at pace with 34 and 35 year olds now being invited for the jab. This is incredible news and means we remain on track to hit our target of offering a vaccine to all adults by the end of July.
Stephen Powis, medical director of the NHS, added: Getting the vaccine is the single most important step we can take to protect ourselves, our families and our communities against Covid 19, so when youre called forward, book your appointment and join the tens of millions who have already been jabbed.
As well as extending the rollout to younger people, the NHS is aiming to ensure that all over-50s can now get their second vaccine dose eight weeks after their first. The national booking system has been reconfigured so that everyone under 40 is sent to a centre where they can get a Pfizer or Moderna vaccine, with the Oxford/AstraZeneca jab now reserved for older groups.
The UK is currently administering an average of more than 500,000 doses a day, with the balance shifting away from a focus on second doses which have dominated the rollout since the start of April.
