Editing LMS Jubilee Class (section)

===Construction===
Although built over only a three-year period the class had many variations due to improvements being made as they were built. The major differences were:
*Boilers – 10 variations, mainly affecting the number of tubes. The earlier boilers were domeless but later boilers were domed. There were two sizes of fire grate area depending on whether the firebox throatplate was straight or sloping.
*Bogies – Approximately 50 of the earlier locomotives were built with ex-Claughton bogies which had a 6 ft 3 in wheelbase compared to the later locomotives built with new bogies that had a wheelbase of 6 ft 6 in.
*Smokebox Saddle –  The first 113 locomotives were built with a two piece saddle; the rest had a conventional one piece saddle.
*Tenders – Four basic patterns were fitted; Fowler 3,500 gallon. Fowler high-sided (10 off), Stanier 4,000 gallon and Stanier 3,500 gallon. These last tenders were difficult to identify, combining the high curved sides of the Stanier tender with the chassis from the earlier type Fowler tender.  The easiest way to spot them is by the top row of horizontal rivets, slightly lower than on the 4,000 gallon version. However, taking into account rivets, wheelbase, and welds this can be subdivided into a total of eight patterns.