Greta Thunberg was plagued by supporters as she arrived in Glasgow ahead of the Cop26 summit, where world leaders will discuss action to tackle the climate crisis.
The Swedish activist arrived at Glasgow Central station on Saturday night and was quickly surrounded by police and other activists as she walked around the station.
The 18-year-old arrived by train a day after taking part in a protest outside Standard Charter’s headquarters in London on Friday.
The international Cop26 conference formally begins on Sunday with a summit of 120 dignitaries and heads of state starting the next day.
Mrs Thunberg is expected to take part in other demonstrations during the two-week event in Glasgow and speak at a meeting hosted by the Cop26 coalition.
However, the activist has noted that her formal participation in the summit is uncertain as she says she has not been formally invited to it.
When asked by the BBC’s Andrew Marr if she had received an invitation to Cop26, she replied: “I do not know. It is very unclear. Not official.
“I think a lot of people may be afraid that if they invite too many radical young people, then it can make them look bad.”
Also arriving in Glasgow was a specially chartered “climate train” that transported hundreds of activists and European politicians to the summit, after traveling through the Netherlands and Belgium.
Lukas Kiefer, a 25-year-old student from Germany who helped organize the trip, said activists wanted to see more subsidies from governments for train travel instead of the aviation industry.
“In Europe, 43 percent of all airports need government subsidies because otherwise they could not run because they are just too expensive,” Mr Keifer said.
“For us, these subsidies need to go into the train tracks so that people can travel cheaply with fast trains all over Europe, because that’s the only way to deal with emissions from the aviation industry.”
The activists were joined on the journey by ambassadors, MEPs and delegations from the governments of the Netherlands, Belgium, Italy and Germany.
Additional reporting from PA