Nineteen-year-old Harvey Mottram was planning a holiday before starting a new job.

It wasn't until the eleventh hour he realised he was missing one vital thing: a valid passport.

He is one of thousands of holidaymakers every year whose plans are put in jeopardy by invalid documents, with the summer months seeing a 40% rise in demand for last minute passports.

STV News has been given rare access to the passport office in Glasgow where staff deal with around 1500 appointments and 10,000 passports every week.

Harvey is one of thousands of people to make use of the same-day service at this passport office, which also provides the option of getting one in seven days.

He tells STV News: "I booked the holiday first and then realised my passport was out of date the day after.

"I was quite angry and stressed.

"I came in today and it was simple really, just wait in the queue and then go in for about five to ten minutes sitting down, then come back and pick it up."

He adds: "I'm a lot happier I got it sorted out because it's a weight off my shoulders and I've got everything sorted now."

Also here to pick up a new passport is Philippa Nicholl.

She was worried she was going to miss a trip to her new employer's headquarters due to lack of a passport, until she applied for a new one online.

"Here I am and I will make my meeting on Wednesday," Philippa says.

"It's much, much more simple than having to go to the post office and get forms and come back and fill them in and take them back again and do all of that application stuff."

Despite the high volume of people and documents that staff at the office get through, officials say 99% of appointments are seen within 20 minutes.

Mandy Loughlin, the passport office's head of operations for Scotland, says that because children's passports expire after only five years rather than ten, it is often families who come in a little panicked.

"It's just making sure that all the passports in the family unit are up to date and have plenty of time on them to go away on your holiday," she explains.