Neil is a 'box tank' locomotive, who worked on the Sodor & Mainland Railway between 1853 and 1901.

A tank locomotive is a steam locomotive which carries its water in one or more on-board water tanks, instead of a more traditional tender. Most tank engines also have bunkers (or fuel tanks) to hold fuel; in a tender-tank locomotive a tender holds …

0-4-0 locomotives were built as tank locomotives as well as tender locomotives. The former were more common in Europe and the latter in the United States, except in the tightest of situations such as that of a shop switcher locomotive, where overall length was a concern.

Neil is a dark green tank engine with an unusual boxy shape and a heavy Scottish accent, originating from the Sodor and Mainland Railway.

The 0-4-0 is associated with the earliest steam locomotives, but one of a pair built as late as 1868 on the North British Railway (NBR) survived to Grouping (1923). Many of the Y9 'Scottish Pugs' also ran with wooden trucks as coal tenders but these were classed as tank engines.

This pack is comprised as an “interpretation” of the Box Tanks history, as with many contractor type locos there isn’t really a set appearance that you can just say is the definitive one. Yes, they

When the Edinburgh and Glasgow Railway was opened in 1842, it used a pair of Neilson & Mitchell beam engines to work the rope incline from Glasgow to Cowlairs station. By 1855, the company was building four-coupled tank engines, along with 2-4-0 and 0-4-2 tender locomotives.

This crane tank locomotive was built by Neilson in 1890 and worked at the Millom Hematite Ore & Iron Co.’s hematite mines. It was employed in moving pit props, sleepers and sections of rail around. It has been claimed that it acquired the name Snipey as the profile of the crane was said to resemble the beak of the Snipe.

This locomotive was built by Neilson in 1892 and was used at the Beckton Gas Works which manufactured gas for most of London north of the Thames and was said to be the largest gas plant in the world.

Box tank locomotives have saddle tanks but the tank itself is box shaped. These locomotives were used globally, the most extensive user of such locomotives was the United States with many box tanks being used on the Pennsylvania Railroad [citation needed] on older steam locomotives built during the 19th century.