The European Health Insurance Card website has crashed following the government's announcement that Brits will be able to travel again.
EHIC cards, which are free to apply for, allow British citizens to access state-provided medical treatment in the European Economic Area, along with Switzerland, when they travel with their card to hand.
Depending on the country, healthcare is either free or at a reduced cost.
But following the government's holiday announcement last night the site has crashed.
People trying to apply for one a card or renew one are met with a message simply saying: "Sorry! EHIC is unavailable
"The EHIC Service you're looking for is not currently available.
"We are sorry for any inconvenience this may cause."
Money Saving Expert Martin Lewis warned people on his ITV show that more than 5.7 million cards are due to expire in 2020 and urged them to check them now.
He said: "Ensure yours is valid before you go away. Even if you've already got travel insurance, it's valuable extra protection, even if just for visiting the local GP with a query while away."
Just 24 hours later the government announced that foreign holidays were to restart with the introduction of a traffic light system which will decide which nations are safe to travel to, with those classed as green or amber available to holidaymakers.
Since mid-March the government has warned against non-essential travel to any country due to the coronavirus pandemic but that will change next week.
The Foreign Secretary has agreed that travel advice can be eased in countries and territories where the public health risk is no longer ‘unacceptably high’ and therefore advice ‘against non-essential travel’ can be lifted.
