Boris Johnson has "serious concerns" about the spread of the new Delta coronavirus variant.

The Prime Minister said he was 'less optimistic' about the complete lifting of lockdown on June 21.

A decision will be made about whether to go ahead with 'freedom day' on Monday.

This comes as 85 people have tested positive for Covid-19 in Berkshire in the last 24 hours.

Public Health England has recorded 85 new lab-confirmed cases in the past 24 hours, in areas including Reading, Bracknell, Wokingham, West Berkshire, Slough and Windsor and Maidenhead.

These figures, correct as of Saturday, June 12, at 4pm, bring the latest total for the county to 58,852.

The local breakdown for the past 24 hours as follows:

Bracknell Forest - 9 cases, 7,382 total

Wokingham - 17 cases, 8,694 total

Reading - 24 cases, 11,470 total

West Berkshire - 7 cases, 6,643 total

Windsor and Maidenhead - 10 cases, 8,663 total

Slough - 25 cases, 16,000 total

A total of 4,558,494 in the UK have tested positive for Covid-19.

The latest seven-day rate per 100,000 people locally are as follows:

Bracknell Forest - 102

Wokingham - 95.8

Reading - 87.2

West Berkshire - 25.9

Slough - 84.9

Windsor and Maidenhead - 23.1

In today's national Covid news:

Boris Johnson has warned the spread of the Delta variant of the coronavirus is a matter of “serious, serious concern”.

The Prime Minister is expected to announce a delay to lockdown lifting in England of up to four weeks amid warnings the country is facing a third wave of the virus.

He told Sky News: “It’s clear that the Indian variant is more transmissible and it’s also true that the cases are going up, and that the levels of hospitalisation are going up.

“Now, we don’t know exactly to what extent that is going to feed through into extra mortality, but clearly it’s a matter of serious, serious concern.”

Asked if he was less optimistic now than he was at the end of May, he said: “Yes, that’s certainly fair.

“What we want to do is make sure that the road map is irreversible, but you can’t have an irreversible road map unless you’re prepared to be cautious.

"Some of the data is still open to question, but we’ll be making an announcement on Monday.”