Swedish environmental activist Greta Thunberg takes part in a demonstration by the Extinction Rebellion (XR) climate change group, as they protest against plans to increase private jet flights, at Farnborough Airport in Farnborough, on Jan 27, 2024. (PHOTO / AFP)

LONDON — Climate activist Greta Thunberg is expected to stand trial in a London court on Thursday charged with a public order offense over a protest outside an oil and gas conference last year.

Thunberg, who became a prominent campaigner worldwide after staging weekly protests in front of the Swedish parliament in 2018, was arrested in October after protesting outside a London hotel where the Energy Intelligence Forum was hosting industry leaders.

Their trial will be conducted by a judge without a jury and is expected to take at least two days. If convicted, they would face a maximum fine of 2,500 pounds

READ MORE: UK police charge climate activist Greta Thunberg after protest

The 21-year-old is one of five people listed to stand trial at Westminster Magistrates’ Court on Thursday. All five, aged between 19 and 59, have pleaded not guilty to a single offence under the Public Order Act for allegedly failing to move when asked to by police.

A smiling Thunberg made her way through photographers and police officers to chants of "climate protest is not a crime" by environmental activists who were stood outside the court.

Their trial will be conducted by a judge without a jury and is expected to take at least two days. If convicted, they would face a maximum fine of 2,500 pounds ($3,160).

READ MORE: Greta Thunberg charged again for disobeying police order

Environmental protesters, including from Greenpeace, have said they will demonstrate outside the court in solidarity with the defendants.