London Midland and Scottish Railway diesel locomotive 7051 was built by the Hunslet Engine Company to demonstrate its wares. After public exhibition in February 1932 it was used for trials at a colliery before being tested by the LMS. After further public exhibition in February 1933 it was at last purchased by the LMS in May 1933. It was loaned to the War Department from August 1940 which numbered it 27. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
The answer to this question is:
Mean Of Transportation