Police are appealing for information after a boat was damaged in an arson offence in Aspley Marina, Huddersfield.
It took place after a suspect set fire to the canopy at the front of the boat causing significant damage.
A woman and man were sleeping on the boat at the time, and were awoken by the fire which they managed to put out.
While outside they spoke to a man present, next to the boat who told them his name was Francis and who said he was going to go search for suspects but then left the scene.
DC Lisa Saberton of Huddersfield CID, said: “We are investigating this offence and are issuing an E fit of a man we wish to speak with in connection what took place.
“The male, who was present at the scene, told the occupiers of the boat his name was Francis, and said he would search the area but disappeared.”
“He was described as white, in his late 30s, and medium build with short dark hair and appeared to have a slight accent.
“We would ask this man to come forwards or for anyone who may know his identity to contact us as we wish to speak with him in connection with what took place.”
She added: “This was clearly a very serious offence which certainly endangered the lives of the two persons aboard and caused serious damage to the boat.

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