The website for booking new driving exams in England and Wales crashed after being relaunched on Friday morning following the coronavirus lockdown.
The Driver and Vehicle Standards Agency (DVSA) said it was aware that some people could not complete their bookings amid “unprecedented requests”, adding that it was working to fix the problem.
The driving test slots were open for booking from 08:00 BST.
Many people have complained on social media that they are unable to access the site.
“The coronavirus has severely impacted our business as usual, including stopping driving tests for many months as part of social detachment,” a DVSA spokesperson said.
“Following the unprecedented demand for the test drive booking system after its reopening, we are aware that some users have not been able to complete their test bookings.
“We are working urgently to resolve this issue and apologize for any inconvenience this may have caused to those who have not been able to book so far.”
A limited number of tests were available on Friday, but more will be released on Monday, the DVSA said.
Test slots are only available up to six weeks in advance, to allow the DVSA to react quickly to any changes in the government’s coronavirus guidelines.
People have also been advised to check the availability of alternative test centers nearby if they are unable to book a test at their preferred test center.
The DVSA suspended all driving tests for up to three months starting March 20.
They have already rebooted in England and Wales for people who have had their tests canceled due to the coronavirus, and will be back in Scotland on 14 September.
People in Scotland are not yet able to book a new driving test.
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