The stalwart little ferry Fori has been carrying foot passengers across the River Aura in Turku, Finland, since 1904.

An iconic part of the city’s transport infrastructure, something had to be done about its polluting diesel engines.

So the city authorities went to local boatyard Mobimar to upgrade the Fori into a zero-emissions ferry fit for the 21st century.

It is now back in the water after a year-long upgrade.