Coronavirus live: Ireland limits AstraZeneca vaccine to over-60s; surge testing deployed in London after South Africa variant found

6.19pm EDT18:19

Since rare but severe clotting was seen in some people following vaccination with AstraZeneca’s Covid-19 vaccine, researchers worldwide have been grappling to understand why the clotting syndrome, known as “thrombosis with thrombocytopenia” (clotting with a low platelet count), occurs.

Melissa Davey brings you up to speed here:

5.57pm EDT17:57

at 5.59pm EDT

5.32pm EDT17:32

All over-50s in England have been offered a coronavirus vaccine a few days before the mid-April deadline set by the government – meaning the second phase of the rollout to younger cohorts can now begin.

Despite fears of a supply slowdown and possible knock in confidence after a change in advice on who could get the Oxford/AstraZeneca jab, Boris Johnson hailed the passing of “another hugely significant milestone”.

With more than 32 million people now having had a first dose and 7.6 million of those having received their second, the prime minister said “many thousands of lives” had been saved.

5.23pm EDT17:23

5.07pm EDT17:07

4.36pm EDT16:36

Ireland limits AstraZeneca vaccine to over-60s

4.19pm EDT16:19

at 4.21pm EDT

3.34pm EDT15:34

Surge testing deployed in south London after South African variant found

at 3.35pm EDT

3.27pm EDT15:27

3.11pm EDT15:11

2.47pm EDT14:47

1.41pm EDT13:41

1.24pm EDT13:24

1.05pm EDT13:05