The Age of Austerity

Whilst acknowledging Avonsides point about mistaking the "Uglies" for a Hunslet development I can also see the logic of the RSH development from the Manning Wardle 16" designs especially since the 1895 design was copied for further ironstone duties, firstly by Kitson (K5469 / 70 / 73 / 74 / 76 - 78 = S&L 44 -50) then RSH (RSH7003 / 04 / 30 / 31 / 32 = S&L 51 - 55); however Eric Tonks does note that the "Uglies" were designed by RSH in consultation with S&L to incorporate the best features of the Manning Wardle (16") locomotives but adopted the 18" cylinders of the Hunslet design (from HE 2411-16 batch) and - presumably - other features that assisted the (false) identification of the design being derived from the Hunslet Austerities.

 

If you look at an 'Ugly' and an Austerity, I don't think that you'll find much that is common between the two, other than the wheel arrangement and the size of the cylinders. S & L wanted bigger locos than the 16"; going to 18" isn't exactly copying an Austerity, it is simply the logic of going bigger.