Firefighters tackled a fire on a boat moored on Spring Lane in Hackney.
A small part of a 15-foot pleasure cruiser was damaged by fire. A man left the boat uninjured.
A London Fire Brigade spokesperson said: “There were a lot of possessions and clutter inside the boat which made it challenging for firefighters.
“Accumulating a lot of household items can cause fires to spread faster, especially when there are flammable items such as newspapers or cardboard. Exit routes can also become blocked, making safe evacuation more difficult.”
The Brigade was called at 2118 and the fire was under control by 2215. Three fire engines and around 15 firefighters from Tottenham, Bethnal Green and Hornsey fire stations attended the scene.
The cause of the fire is under investigation.