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Frequently Asked Questions

PCR Tests for Travel

Your testing kit will come with clear, easy to follow instructions.

Your kit will be processed at Salient Bio laboratory in London. You test kit will come with instructions to advise you. It is essential that you activate your test kit on the Salient Bio website. You should submit your personal details, the date and time of your test using the Barcode details supplied with your test kit. Register your outbound travel PCR swab as a ‘general test’.

When you have taken your sample, it should be returned in the pre-paid security packaging to our partner laboratory (Salient Bio) using Royal Mail tracked 24-hour delivery.

Inside your test kit you will find a Royal Mail tracked 24-hour delivery pre-paid security envelope. Please use a Royal Mail Priority post box. You can find your nearest Priority post box on the Royal Mail website (

If you have chosen our collect and drop service, you will be able to collect your PCR test 3 working hours after you place the order. Then you should take your swab test sample off-site (we do not have facilities available in the building for you to take your test) and return it in the supplied packaging to our first floor reception.

From posting in a Priory Royal Mail Post Box, test results are usually available within 48-72 hours. Test samples posted after last collection on Saturday will not be received at the laboratory until Tuesday. If you prefer to expedite delivery of the test you may prefer to send your sample by private courier (at your own expense).

If you have chosen our collect and drop service your test will be returned by same day courier for same day by midnight (provided it is dropped by 11am), or next day by 6pm (provided it is dropped by 3pm) results.

There is a Tracking ID shown underneath the Barcode on your Tracked 24 Return Label. This can be entered into the Royal Mail site here to see details of your Sample Return.

A positive result means it’s likely you had coronavirus (COVID-19) when the test was done. While you’re no longer required by law to self-isolate, if you test positive for COVID-19, you should still stay at home and avoid contact with other people. This helps reduce the chance of passing COVID-19 on to others.



It is not possible to say if you had the virus when the test was done. Therefore, you will need to take another test.

Rapid Antigen Tests for Travel

A number of countries, including the USA, Germany, France and Italy accept antigen tests. You should check the destination country for their COVID-19 entry requirements. Medwyn’s antigen test has a high level of accuracy and meets the UK’s standards for sensitivity, specificity and viral load.

When choosing a COVID-19 antigen test appointment check carefully how many hours before arrival in the destination country you are required to have a negative test result. It is your responsibility to make sure that your destination accepts this test. If you need guidance, the UK government travel advice website provides detailed country entry requirement information at

The PCR test detects the genetic material in the COVID-19 virus called RNA. When the swab sample reaches the lab, a solution known as a ‘reagent’ is added. If there is virus present this reagent starts a ‘chain reaction’ and creates billions of copies of the genetic material in the virus so that there is enough that it can be detected and analysed by scientists to provide a positive result. This test is also known as an RNA, genetic, molecular, viral detection or swab test.

A Rapid Antigen test looks for the presence of specific proteins called antigens based on the surface of the virus from a nose or throat  swab sample and is not as sensitive as the PCR test in detecting COVID-19.

You should always check the testing entry requirements for the country you are visiting before you book an antigen test to check the results will be valid. 


97.1% (83.8%-99.9%) – 95% Confidence Intervals


99.6% (97.7%-99.9%) – 95% Confidence Intervals

Limit of detection:

1.6×102 TCID50/mL

The Rapid Antigen (lateral flow) Test is much quicker in delivering results than a PCR test. Your results will be ready within 15-20 minutes after your swab sample has been applied to the device. 

Your Fit to Fly Certificate is provided at the same time you attend a clinic appointment or emailed to your preferred email account approximately 2 hours after your remote video test.

Once you have purchased your antigen test kit you will be be asked to book a date and time for your remote antigen test. The weblink for your appointment will allow you to securely log in for to your video consultation from your mobile device or laptop. You will be sent an email and SMS reminder before the appointment so you don’t forget.

At the test appointment your identity will be confirmed. Your swab test will be supervised by one of our professional healthcare advisors and your test results should be available after approximately 15 minutes. You will be asked to submit photo evidence of your test result online so your certificate can be issued from Medwyn OH by email and you may then travel overseas.

If your test result is inconclusive this indicates you ‘may’ be infected with coronavirus, or the antigen test was unable to confirm a definite negative or positive result. In this situation it is advised to repeat your test with a further sampling kit. If the result is still is still inconclusive you should be tested with a molecular PCR test to exclude coronavirus.

If you test result is positive there is a high probability you are infected with COVID-19. You will not be able to travel without a negative molecular PCR test which is considered the ‘gold standard’ for identifying SARS-CoV-2 (COVID-19). 

General Questions

Yes, DPD will send you an email and text with your tracking ID when your test kit is dispatched. 

To track your delivery please log into the DPD website Parcel Tracking UK | Track Package | DPD Local Online ( and enter your tracking ID.


If your travel plans change, please contact us at least 5 days in advance so we can review your options. 

With more than 5 days notice we may be able to change the dates of dispatching your testing kit, offering a credit note, or cancelling your booking after deducting an administrative fee of £20 per person.

Please email us at and we will consider your individual circumstances. 

You can contact our team by sending an email to or calling us on +44 (0) 1306 873942.

Which in-clinic test are you looking for?

Book an in-clinic appointment for an individual Day 2 or Day 8 Covid-19 RT-PCR test

Book an in-clinic appointment package that includes both Day 2 and Day 8 Covid-19 RT-PCR tests.

Sunday 15 May 2022:
We apologise for current problems with our phone lines. This is being investigated by our technical team.
Please use online chat or email if you need to contact us.

What in-clinic test are you looking for?

Book an in-clinic appointment for an individual Day 2 or Day 8 Covid-19 RT-PCR test

Book an in-clinic appointment package that includes both Day 2 and Day 8 Covid-19 RT-PCR tests for £189.