Interviews for first-time applicants for passports have been suspended in London as staff struggle to deal with the 30,000 backlog of applications, the Home Office has said.
First-time adult applicants who have booked interviews at HM Passport Office's Globe House in Victoria are being directed to other offices in South East England so staff can concentrate on fast-track renewals.
A Home Office spokeswoman said it was normal practice during busy times and that only a "handful" of people had been affected.
"It is standard practice. It is nothing out of the ordinary. It happened last year," she said.
The Home Office has outlined how people who are facing delays to their passport renewal can get it fast-tracked for free.
If you are worried about your passport application not being ready ahead of your holidays, there are a few options available to you.
Photos shown to ITV News appear to reveal the scale of the backlog at the Passport Office, amid staff claims of "blind panic".