Hi Dipankar,

The archive of W.G.Bagnall drawings is held by the Stafford Records Office.
Website: [www.staffordshire.gov.uk]

If you can get hold of one, a reproduction of the GA drawing for the Delta class locos is reproduced in the journal of the Narrow Gauge Railway Society "The Narrow Gauge" issue 119 in an article by Allen C. Baker titled "The Mcleod light railways and their Bagnall locomotives".

GA drawings for Bagnall locos were the exception rather than the rule.

I happen to know that drawings also exist for the 0-6-4 tank engines that ran on this line. There is no GA drawing so you would need the pipe diagram, motion drawing and the rear bogie arrangement drawing.

Regards,
Paul.