The UK government has vowed to offer a first coronavirus vaccine dose to every adult by the end of July, as it readies to announce a gradual easing of its third lockdown.

Prime Minister Boris Johnson, who will outline the lockdown review in parliament on Monday, said the faster inoculation campaign would seek to offer a first dose to everyone aged over 50 by mid-April.

The previous targets in the world-first campaign were to inoculate over 50s by May, and all adults by September.