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COVID-19 PCR Test to Release in East and West London

Mare St Clinic is now offering COVID PCR Test to Release in East and West London. This test can prove essential for those who have to travel regularly for work. A negative result will cut out time spent self-isolating at home so that you can get back to work as soon as possible. 

The test is not suitable for those who have COVID-19 like symptoms or for those who have had signs up to 28 days prior to the test – they should follow all government guidance regarding self-isolation and testing.

Price: £160 - Home, Hotel or Workplace testing

Price: £89 - In-clinic testing for NEXT DAY Results

Price: £69 - Home Self-testing Kit

What is Test to Release?

If you have recently arrived from outside of the UK, current government guidance states that you must self-isolate for 10 days upon your return.

Our Test to Release Scheme offers you the opportunity to pay for a private COVID-19 test 5 full days after your UK arrival.

We use a PCR test, which has undergone testing by PHE and NHS Clinical pathology labs independently and has obtained a specificity of 98% and 100%, respectively. PCR stands for Polymerase Chain Reaction. The test directly detects the presence of the genetic material/antigens of the COVID-19 virus, indicating whether or not there is an active infection. This test does not see the presence of the body's immune response or antibodies. 

If your test comes back negative, you no longer have to self-isolate. However, if you test positive, you must continue to self-isolate for another 10 days. It should be calculated as 10 days from when you took the test or when you first started to show symptoms, whichever came first.

Where can I get my test?

Whether you're from Fulham, Hackney, or Kensington, we offer two alternatives for TTR testing to suit you, so we can help you get back to business as usual. During weekday evenings, we offer you the chance to purchase home testing, to bring your TTR test to you. If you are looking to get a COVID PCR Test to Release in East and West London during the weekends, we offer testing within the clinic.

* Please note: we only offer COVID PCR Test to Release Home Visits in East and West London (E12, E6,  EC1, W12, W13, W14 etc).

How long does it take to get my results?

From the point of completing the test, it will take 24 hours from when the lab receives it to get your results. If your test is negative, you will be released from your remaining self-isolation period.

Before you get tested, we strongly advise that:

- A proof of identity will be required prior to having your sample taken. It can be an ID Card, Passport (required for travel certificate), driver's license, or residents permit. Unfortunately, we will not be able to assist you if you do not have any legal identification on you.


Nothing can go in your mouth for at least 2 hours before testing, and this includes food, drinks, cigarettes, chewing gum, etc.


- Mouthwash is not to be used for 24 hours.

- Nothing can go in your nose for at least 24 hours prior to testing; this includes nasal medication, saline, hay fever sprays, cotton buds, etc.


All of the above can inhibit the sample and mean that it needs to be retested, or they may not deliver a conclusive result.

* Important Note: Please read our T&C's before purchasing this product. If you proceed to"Book Now" below, you Have Read, Understood, and agree to our Terms and Conditions.

Gathering Informations

COVID-19 PCR Test to Release in East and West London

Frequently asked questions

What is a Lateral Flow Test?

The UK government is using Lateral Flow Tests as a quick way to determine if someone is infected with COVID-19, particularly asymptomatic carriers of the virus. Our lateral flow test involves taking a nasal swab and processing it using a small device that comes with the kit. It looks for a specific antigen, which is an indicator of the presence of COVID-19. The short processing time of this test makes it ideally suited for frequent testing, such as for travelers or in workplaces and educational institutes.

What is Day 2 Lateral Flow Certificate?

The Day 2 Lateral Flow Test replaces the prior Day 2 RT-PCR Test for incoming travelers who are fully vaccinated with an approved vaccine and coming from a country that is not on the red list. If the test result is negative, one does not have to self-isolate.
A Day 2 certificate is generated and supplied if the test result is negative. The Day 2 certificate includes your name, date of the results, passport number, date of birth, name of the test, and your test result, among other details that can be presented to authorities. It is signed by our lab's specialist.

​How long does it take to get the result of a Lateral Flow Test?

Our Lateral Flow Test takes no more than 15 to 30 minutes to provide the results. This is the amount of time it takes after you have taken the swab sample and finished the rest of the process.

​How does the Lateral Flow Test work?

You can buy the Lateral Flow Test from our Online Store — we are an accredited test provider with quick delivery of kits and turnaround time of results. To take the test, you are to follow the Lateral Flow Test instructions that come with the kit. These instructions include steps about how to take your swab sample, how to transfer the sample to the test cassette and relay it to us for digital confirmation.

Where can I purchase a Rapid Lateral Flow Test?

​You can buy the test from our Online Store with delivery guaranteed within 2-3 working days. Orders are also processed over the weekend to ensure we have them delivered to you on time.

​How long does it take to get the results of a Lateral Flow Test?

After you insert the swab sample in the extraction fluid, mix it, and put two-three drops of it onto the test cassette, it will take 15 minutes to get results.

What is the difference between Lateral Flow Tests and RT-PCR tests?

Both the RT-PCR and the Lateral Flow Test require nasal swabs, but the difference is in how the two are processed and the time they take. The RT-PCR test has to be sent to a lab for analysis, and it may take many hours to get the results. The Lateral Flow Test, on the other hand, is done entirely at home, and the results take no more than 15-30 minutes on average.A Lateral Flow Test is generally for people who are not showing any symptoms of COVID-19, whereas an RT-PCR is for people with symptoms. Moreover, since the RT-PCR test is more precise and accurate if you test positive on a Lateral Flow Test, you also have to take a further RT-PCR test for confirmation.

Should I get tested if I have no symptoms?

​Yes, you can be infected by COVID-19 and not have any symptoms. About 1 in 3 people with COVID-19 tend to remain entirely asymptomatic but can infect other people. Therefore, if you are traveling, or believe you have been in contact with someone infected with COVID-19, it is recommended that you get tested.

How can I perform this test on my own?

​The test has simple instructions and can easily be performed at home. It requires taking a nasal swab sample, which is then applied to the lateral flow cassette for results.

Can I take a Day 2 antigen test if I travel to the UK from a red list country?

​If you are traveling to the UK from a country that is on the UK's red list, you won't be eligible to take a Day 2 lateral flow antigen test. This applies to both vaccinated and unvaccinated people. Travelers from red list countries have to take a PCR test for the Day 2 and Day 8 tests and quarantine at a government-approved quarantine hotel.

​I tested positive on a Lateral Flow Test. What now?

​If you get a positive result on a Lateral Flow Test, you are required to self-isolate at once. You will then need to take a mandatory RT-PCR test for confirmation within 48 hours. You can get this test by ordering an RT-PCR home test kit from our online store.

What does it mean if my test results are 'void' or inconclusive?

You will get a 'VOID' or 'inconclusive' test result if your swab sample comes into contact with anything other than the inside of your nose. It will be contaminated and cannot be used to test for COVID-19 reliably. You can also get a 'void' result if you have an excess of mucus in your nasal cavity. It can also be due to a manual error in the testing procedure.In case of a void result, you will need to retake a swab sample with a new swab and try to ensure that you follow all the correct procedures to reduce the chance of getting a void result again.

My test result came back as positive. What now?

If your test result is POSITIVE. You and anyone else in your household must self-isolate immediately in accordance with Governmental guidelines.You will have to Report your lateral flow test results to the NHS, and you will also need to book an RT-PCR test for verifying the test results. You can arrange an RT-PCR test online or via phone by dialing 119.If your confirmatory RT-PCR test is also positive, you will be contacted by NHS Test and Trace, and you must enter self-isolation at home for a duration of ten days. Your self-isolation period will start from the moment you begin to experience symptoms of COVID-19. If you are asymptomatic, your ten days will start from the time your test was performed.You must not travel or meet anyone during self-isolation. Contact 111 if you need medical help, and in case of emergency, dial 999.If the confirmatory RT-PCR test is negative, you remain asymptomatic, and no one in your household has symptoms or tested positive, you and your household can stop self-isolating. However, you must continue to follow all other COVID-19 related government guidance to help protect yourself and those around you.For any further information, you can email us at or call us at 0203 488 7351.​

My test result was negative. What now?

If your test result is NEGATIVE, you will receive a confirmation of your results via email within 12 hours.Make sure to continue following all other COVID-19 related Government guidance to help protect you and those around you.If your Lateral Flow Test result is negative, but you are experiencing COVID-19 related symptoms, you should still self-isolate and book an RT-PCR test. If the RT-PCR test comes out negative and you remain asymptomatic, you can stop self-isolating.For any further information, you can email us at or call us at 0203 488 7351.

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