|Power Classification||0F reclassified Dock Tank in 1953|
|Driving Wheels||3ft 0ins|
|Cylinders||Inside– 11in x 15in|
|Valve Gear||Stephenson – (slide valves)|
The dock tanks were introduced by Worsdell on the NER in 1890 as the NER class K.
The locomotives became the Y8 class under the LNER and were a smaller version of the Y7 class. They had smaller open backed cabs and marine type boilers with a cylindrical flue into which the grate fitted. They were reboilered with more traditional boilers similar to those fitted to the Y7 class locomotives.
Five locomotives were built and with one exception all of them were employed at Hull docks until two were withdrawn from service in 1936/7 The exception was the loan of one locomotive (NER 559 subsequently BR 68090) for military work during the First World War (Royal Arsenal at Woolwich
The exception was the loan of one locomotive (NER 559 subsequently BR 68090) for military work during the First World War (Royal Arsenal at Woolwich, and Royal Engineer work at the mouth of the Humber. This locomotive was moved to Hull Springhead shed at the start of 1945.
The traffic at Hull docks reduced significantly as a result of the Second World War so in 1942 NER 560 (later 68091) was relocated to York
Of the two taken into BR stock 68090 only lasted in BR service at Hull until November 1948.
68091 worked as the shed pilot at York and was taken into departmental stock in July 1954 but continued in its role at York until it was withdrawn from service in November 1956.
All of the five locomotives were scrapped.
In October 2022 plans were revealed to build a replica Worsdell class K locomotive to work at Beamish.
The locomotive is to be built by North Bay Railway Engineering Services with the aim of having the locomotive in operation in the spring of 2025 to enable it to take part in the Stockton & Darlington Railway bicentenary celebrations.
It is anticipated that the wheels and cylinders will be ordered before the end of 2022.
The locomotive which is being build thanks to sponsorship from a private benefactor will be fitted with a marine type boiler.