Editing LMS Jubilee Class (section)

===Performance===
These locomotives had a bit of a mixed reception during their early working days, but while their reputation did improve over time, they didn't reach the same amount of praise as the Black 5 locomotives.<ref>{{cite web |title=Review: Jubilees & Black 5's |url=https://locoperformance.tripod.com/edition19/jubileesblackfives.htm |website=Locomotive Performance |access-date=26 May 2021}}</ref> When the first members were built, the original 113 batch of engines to be precise, engine crews said that they were often disappointing. Crews often said that they were poor steamers and that the older locomotives that would be eventually replaced by them often performed better. However, once the problem with these engines was found and fixed after several extensive trials took place (the problem being that the diameter of the blast pipe was too large for the engines to make proper steam), the Jubilees went from being a theoretical success to an actual success thanks to some modifications.<ref>{{cite web |last1=Robinson |first1=Simon |title=History |url=http://www.jubilees.co.uk/history/ |website=Jubilees |access-date=26 May 2021 |date=31 August 2012}}</ref><ref>{{cite web |title=6P5F & 7P 45552 – 45742 4-6-0 LMS Stanier Jubilee |url=https://preservedbritishsteamlocomotives.com/6p5f-7p-45552-45742-4-6-0-lms-stanier-jubilee/ |website=Preserved British Steam Locomotives |date=4 July 2017 |publisher=WordPress.com |access-date=26 May 2021}}</ref><ref>{{cite web |last1=Physick |first1=Liam |title=Leander |url=http://www.edgehillstation.co.uk/resources/leander/ |website=Edge Hill Station |access-date=26 May 2021 |date=25 November 2011}}</ref>