Apple boss Tim Cook has made a surprise visit to staff in the technology giant's Glasgow store.

The chief executive, who is in Scotland to collect an honorary degree from the University of Glasgow, dropped into the Buchanan Street shop and briefly spoke to staff.

Work stopped for around 15 minutes on Wednesday afternoon as staff and customers greeted Mr Cook and took selfies.

Before leaving, he was presented with two gifts - a tartan scarf and an embroidered picture. He said he loved the scarf but asked: "How are you supposed to fold this?"

The embroidered picture shows Mr Cook waving and the words: "Welcome Tim."

It also features saltires and the Loch Ness monster. He joked: "That's great. I recall looking for the Loch Ness monster in 1984. Everything is right but the colour of the hair."

Mr Cook was later awarded a doctorate of science in a ceremony at the university.

During the presentation, he reiterated his opposition to Donald Trump's travel ban, saying "if we stand and say nothing it's as if we're agreeing".

During a Q&A with students and university staff he was asked for his response to Trump's order targeting people from seven predominantly Muslim countries.

Mr Cook said: "I wrote this letter, you probably read about it unless you're living underground, about the most recent executive order that was issued in the US.

"We have employees that secured a work visa, they brought family to the US, but happened to be outside the US when the executive order was issued and all of a sudden their families were affected. They couldn't get back in.

"That's a crisis. You can imagine the stress.

"If we stand and say nothing it's as if we're agreeing, that we become a part of it. It's important to speak out."

Since taking the helm of the company, Mr Cook has led the introduction of new products such as the iPhone 7, iPad Pro and Apple Watch.

He is also leading a company-wide effort to use 100% renewable energy at all Apple facilities.

In 2015, the 56-year-old became an honorary patron of Trinity College Dublin's Philosophical Society and gave a talk to students.