Clarksons Platou Securities is tipping a big fall in laid-up platform supply vessels (PSV) as a buoyant North Sea market basks in an "endless summer."

Turner Holm, managing director of equity and credit research, and analyst Sven Sele, said the sector is "unseasonably strong", with 2019 the strongest first quarter for spot rates since 2014.

On Tuesday, the 4,200-dwt PSV NAO Thunder (built 2013) was reported fixed at £20,000 ($26,145) per day for two weeks of supply duties by Team Marine, according to broker Westshore.