People who are fully vaccinated against coronavirus and come into contact with someone who tests positive will be advised to wear a mask and reduce their contact with others but will not have to isolate, under new guidance.

From Monday, people in England who have had both doses of a Covid-19 vaccine will no longer have to spend 10 days in quarantine if they are a contact of a positive case.

They will be advised to take a PCR test, but that will not be compulsory and they will not have to self-isolate while they wait for the result.

If someone develops symptoms of the virus, the Government says they should self-isolate and get a PCR test, and stay in isolation until the result comes back.

The new guidance will apply to people who had their final dose of an approved vaccine at least 14 days before coming into contact with a positive case.

People who test positive will still be legally required to self-isolate.

The Department of Health said that due to the fact even the double-jabbed are still at risk of being infected, contacts will be advised to consider other precautions like wearing a mask in enclosed spaces and limiting interactions with other people, especially the clinically extremely vulnerable.

Health Secretary Sajid Javid said Monday will be “another huge step back towards our normal lives”.

He said: “Getting two doses of a vaccine has tipped the odds in our favour and allowed us to safely reclaim our lost freedoms, and from Monday we can take another huge step back towards our normal lives by removing self-isolation requirements for double-jabbed people who are contacts of people with Covid-19.”

The Government said people will also continue to be encouraged to do rapid lateral flow testing twice a week in an effort to find asymptomatic cases of the virus.

Health and social care staff will have to provide a negative PCR test to return to work if they are a contact of a positive case, and also take daily lateral flow tests for 10 days as a precaution, while those working with clinically extremely vulnerable patients will need to undergo a risk assessment before going back to work.

People using the NHS Covid-19 app who are identified as close contacts of a positive case will be asked to self-declare if they are under-18 or double-jabbed and will be advised to book a PCR test.

The latest Government figures show that 317,132 alerts were sent to app users in England and Wales in the week to August 4, telling them they had been in close contact with someone who had tested positive for coronavirus, down 20% on the previous week.

People whose isolating period is due to end after August 16 can leave self-isolation on Monday.

A relaxation of the rules on self-isolation in Northern Ireland will come in from Monday, with close contacts of positive cases not having to quarantine as long as they test negative, have no symptoms and have had both jabs of a Covid-19 vaccine.

The change came into effect in Wales on August 7, while in Scotland it is also already the case that double-vaccinated adults and all children can avoid self-isolation as a close contact so long as they are symptomless and provide a negative PCR test.

On Thursday, NHS England said thousands of young people approaching their 18th birthday can now book their jab.

More than 100,000 eligible teenagers will be sent text messages inviting them to get a vaccine.

There are more than 300 sites across England currently offering jabs to 16 and 17-year-olds, after the rollout was extended to that age group last week.

When it comes to school children, the Government has said it will review testing requirements by the end of September.

The new school year in England will see bubble arrangements end for pupils.

Secondary school and college students are expected to do two onsite tests on their return to education, followed by twice weekly testing at home.

Meanwhile a Conservative MP has said private Covid-19 tests should be capped at £40, as a watchdog looking into the testing market confirmed a review could take up to a month.

The move would allow more people to travel abroad, putting aviation “back on a sustainable path to recovery”, according to Henry Smith, chairman of the Future of Aviation All-Party Parliamentary Group.

A list of providers offering PCR tests which meet minimum standards on the Government website shows more than 100 outlets charging £200 or more.

Mr Smith, MP for Crawley, wrote in The Telegraph: “Government needs to build on recent progress with vaccination exemptions from quarantine by eliminating testing requirements from low-risk countries, and by capping the price of PCR tests to something like £40 – if and where they are still needed.

“The summer is almost gone, but it isn’t too late to put aviation back on a sustainable path to recovery and save as much sector employment as possible.”

It comes after Mr Javid asked the Competition and Markets Authority to investigate the cost of travel PCR tests in response to concerns about the cost for families travelling abroad.

As of 9am on Thursday, there had been a further 33,074 lab-confirmed Covid-19 cases in the UK, the Government said.