The currency specialist confirmed a software virus was discovered on 31 December which “compromised some of its services”.

As a result, it took all its systems offline while it conducts an investigation.

Travelex said there’s no indication that any personal or customer data had been compromised and its IT team and cyber security experts are working to isolate the virus and restore affected systems.

While customers can’t access the website or app to buy, sell or top-up Travelex money cards, branches remain open to provide foreign exchange services. Holidaymakers can also top-up via https://multicurrencycashpassport.com/

Any customers with enquiries are asked to send a message via Twitter (@TravelexUK) where it will try and help.

A statement read: “We apologise to all our customers for any inconvenience caused as a result. We are doing all we can to restore our full services as soon as possible.”