GNR Class N1

The Great Northern Railway Class N1 was a class of 0-6-2 side tank steam locomotives designed by Henry Ivatt and introduced in 1906. Most of the class were fitted with condensing apparatus and worked in the London area, from the King's Cross and Hornsey depots, on empty coach trains and on cross-London exchange freight trains. In 1914 Crewe Works built an armoured train around one of the engines, which was covered in 14 millimetre steel plate with observation apertures closed by sliding steel shutters. Two of the tank engines, numbers 1587 and 1590, were loaned to Crewe to be armour plated and were named HMT Norna and HMT Alice. They were sold back to the London and North Eastern Railway in 1923 and their armour plating was removed. The class was withdrawn between 1947 and 1959, and none has survived.