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National Advice Line phone number change

Following feedback from callers to the line, our advice line number is changing from the non-geographic 0845 number to 020 7383 7474.

Initially, an auto-divert function is in place for callers who ring the old number. Callers will pay for the call as they would for any other UK geographic number, or alternatively it would be deducted from their bundled (often free) call allowance as is common with most mobile phones and fixed line packages. We still advise callers check with the bill payer or service provider before calling.


Advice line for health professionals

Telephone: 020 7383 7474

Please note: mobile charges may vary

The advice line is usually staffed by one Specialist Nurse Advisor.

Advice line opening hours:


    • Monday to Friday 09:00 - 11:00


    • Monday and Friday 13:00 - 14:00
    • Tuesday, Wednesday and Thursday 13:00 - 15:30

Please ensure that you are familiar with the detailed information available on the country specific information and the factsheets for special risk travellers as caller questions can sometimes be answered by reading the information available on the website.

Health professionals with non-clinical travel related certificate enquiries (ICVP, Hajj/Umrah or polio) can use the vaccine certificate email service. This service should not be used for clinical enquiries. If your enquiry is about a serious suspected adverse event following yellow fever vaccine administration please report during office hours via the NaTHNaC advice line or email:

Please note: NaTHNaC does not keep a central record of all yellow fever vaccines given to individuals. We are therefore unable to re-issue yellow fever certificates or provide information on previous vaccination dates / batch numbers.

Information for health professionals calling the advice line

The advice line is for health professionals who have queries about

    • travel scenarios that involve either complex itineraries.
    • travellers with special health needs.

The advice line is usually staffed by one Specialist Nurse Advisor each session and does get very busy. However, many queries can be answered by information that is available online.

In order to make best use of the service there are several resources that health professionals can check prior to calling:

Additionally, it is anticipated that callers will already have accessed key resources such as an atlas, Immunisation against infectious disease (the Green Book) and the Guidelines for malaria prevention in travellers from the United Kingdom in an attempt to find the answer to their query.

Callers are asked to have the following information available:

  • Contact telephone number and postcode of practice/clinic/pharmacy
  • Age; date of birth of babies
  • Body weight of babies (for malaria prophylaxis related enquiries)
  • Past/current medical history (including any relevant recent blood test results)
  • Past/current medication
  • The detailed itinerary of the traveller
  • Date of departure & length of trip
  • Reason for trip & planned activities whilst travelling

We are unable to answer travel health queries from the general public and non-clinical administrative members of staff.

Advice line disclaimer

The purpose of the NaTHNaC advice line is to provide guidance to healthcare professionals advising travellers with complex travel itineraries and/or special health needs.

Whilst NaTHNaC will use its clinical knowledge and expertise to advise on the most appropriate course of action, it is reliant on the information vicariously provided by healthcare professionals and, as such, is unable to review any records or consult with the traveller themself. NaTHNaC does not (and cannot) therefore accept any responsibility for clinical decisions made with regard to the administration of vaccines and prophylactics. Such decisions must be made by healthcare professionals in accordance with the individual circumstances and clinical condition of the traveller.

For the avoidance of doubt, the healthcare professional thus remains responsible for individual risk assessments relating to travel and for any clinical decisions made regarding the administration of vaccines, other prophylactics, or for information given regarding travel health.

Traveller Enquiries

We are unable to provide individual clinical advice to members of the public. If this is required, please contact your GP, pharmacist or travel health clinic for guidance at least 4 - 6 weeks ahead of travel. However, even if time is short, an appointment is still worthwhile. For other health enquiries call 111, free from any phone, or go to

A NaTHNaC email enquiry service for travellers is available for COVID-19 related enquiries only.

Please check the following information before using this COVID-19 related service as many queries we receive can be answered using this information:

1. Step by step guide: what you need to do to travel internationally

2. Foreign, Commonwealth & Development Office: for detailed country specific quarantine and testing requirements of each country

3. TravelHealthPro: country information about risks at your destination including COVID-19

4. COVID testing and demonstrating your status for international travel purposes

We aim to reply to enquiries within 3 working days. Complex queries requiring senior medical input may take longer. Access to this service is available here

Each enquiry informs us of the COVID related challenges travellers experience. We use this to ensure the information we provide on TravelHealthPro is clear and collate anonymise data generated from this service for teaching and research purposes. 


General and media enquiries


Telephone: +44 (0)20 3447 5943

We will respond to general queries within 3 working days.

Please note the NaTHNaC general admin line is open Monday to Friday between 9am and 5pm. If you are unable to get hold of us, administrative queries can be emailed.


Postal address

National Travel Health Network and Centre
UCLH NHS Foundation Trust
3rd Floor Central
250 Euston Road
United Kingdom