[1] They were intended for use as powerful shunting engines to arrange and move coal wagons for loading into ships.

[1] In total 15 were built, 10 by the NER between 1909 and 1910, and a further five in 1925 by the London and North Eastern Railway (LNER).

[4] Whitemoor preferred the ex-GCR 0-8-4T (LNER Class S1) for hump shunting, so in 1934 No 1358 was moved to Doncaster, and No.

[4] The remaining T1s continued to work coal trains at various docks and marshalling yards throughout North East England.

[4] After World War II, coal exports never returned to their pre-war levels.