THE number of people being told to self-isolate has reached another record high, with almost 700,000 alerts sent to Covid app users in England and Wales.

The so-called “pingdemic” saw a further rise last week, with 689,313 alerts sent to users of the NHS Covid-19 app telling them they had been in close contact with someone who had tested positive for coronavirus.

The latest NHS figures, for the week to July 21, are an 11% rise on the previous record high of 619,733 alerts a week earlier.

The rising number of people self-isolating comes after Boris Johnson's plans for "Freedom Day" on July 19 where masks became voluntary in public places, the one metre-plus social distancing rule was dropped and house parties were allowed again.

Earlier this month, the move was criticised by Nicola Sturgeon who said it was "not sensible" given the rising number of Covid cases in the UK.

The First Minister tweeted: “As this chart shows, cases in (Scotland) are falling, but still too high.

“To talk of tomorrow as ‘freedom day’ (England only remember) is not sensible IMO, given current situation.

“Vaccines going well and do offer route through – but as we vaccinate, we must ease up gradually.”

READ MORE: Nicola Sturgeon says 'Freedom Day' in England 'not sensible' due to rising cases

Sturgeon added: "If you live in or visiting (Scotland) please abide by remaining safety measures.

“Stick to group limits, keep 1m distance in public places, wear face masks, wash hands etc.

“While we vaccinate, these measures help keep us safe. More info available at gov.scot.”

This week the Government said it was expanding its daily contact testing for front-line sectors who are exempt from isolation.

A total of 2000 sites across the country are available for people working in prisons, waste collection, defence, the food industry, transport, Border Force and police and fire services.

Daily negative test results will enable eligible workers who have been alerted by the NHS Covid-19 app or called by NHS Test and Trace as coronavirus contacts to continue working.

But one in four young adults who test positive no longer follow the rules for self-isolating, a new survey published on Thursday suggested.

The Office for National Statistics (ONS) said 75% of respondents aged between 18 and 34 said they fully adhered to the isolation requirements for the entire 10-day period after testing positive for coronavirus.

This was “statistically significantly” lower than the percentage of 35 to 54-year-olds who said they followed the rules (86%), according to the ONS, whose figures are based on responses collected from adults in England between July 5 and 10.

READ MORE: Quarter of young adults in England not following isolation rules, survey suggests

Meanwhile the easing of restrictions for EU and US travellers coming to England has been defended as a “smart, sensible” approach by the Government, amid concerns about the risk of a new variant emerging.

Foreign Secretary Dominic Raab said he is confident it is the right step and described the new rules on travel as a “modest opening up”.

From 4am on Monday, England is to allow people visiting from the US and the EU who are fully vaccinated against coronavirus to enter without the need to quarantine.

Labour has claimed there is a risk of allowing a new Covid variant to “run rampant” through the country, and it has been reported the Cabinet had been warned the move posed a “clear public health risk”.

Raab admitted the Government “cannot guarantee” that US and EU travellers will not try to show fake vaccination certificates.

He told BBC Radio Four’s Today programme: “We can’t guarantee that some people might not do it. I think it is highly unlikely.”

Raab said there is a “double lock” of written certification and proof of US residency for American travellers, which he said could allow “further checks if there is any suspicion of fraud”.

READ MORE: Scotland scraps quarantine rules for fully vaccinated EU and US travellers

Describing the new approach as “smart, sensible”, he added: “Both domestically with our rollout but also internationally, we want to open up, we want to move the country forward, but we want to do it irreversibly and we need to take solid, surefooted steps forward.

“We feel this is a modest opening up of international travel, but one which has the reassurances that means that we can take further steps forward as we build confidence in the system.”

The Scottish Government also announced the rule change will apply to fully vaccinated EU and US visitors to Scotland from Monday.

The Welsh Government said it “regrets” the move to remove the quarantine requirement in England, but added it would be “ineffective” to have different rules for Wales.

Ministers in Northern Ireland will consider their position on the change at Thursday’s meeting of the powersharing executive.

Currently, only travellers who have received two doses of a vaccine in the UK are permitted to enter from an amber country – such as the US and most of the EU – without self-isolating for 10 days, except those returning from France.