Join the army and learn ! . Vocational training centres exhibit at Olympia show . The army vocational training centre is one of the 350 exhibitors at the 20 biannual building exhibition to be opened at Olympia points Earl Stanhope , first Commissioner of Works on Wednesday . The exhibit illustrates the opportunities for learning trades which the army provides . Photo shows the army vocational training centres plumbing exhibit , including a lead fountain under construction and a display of copper piping being constructed . 14 September 1936