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Llewellyn Hedmondt Barker (1900-1950) OF ICI.
1951 Obituary 
"LLEWELLYN HEDMONDT BARKER, M.A., spent the whole of his engineering career with Imperial Chemical Industries, Ltd.
He was born in 1900 and attended the East Finchley Grammar School, St. Aloysius School, Highgate, and the County School, Richmond, afterwards spending the period 1916-20 at the Regent Street Polytechnic, London, where he studied engineering. He then served a two-year apprenticeship with Messrs. Ruston and Hornsby, Ltd., Lincoln, and in the following year proceeded to Cambridge, where he graduated B.A. with first-class honours in the Mechanical Science Tripos in 1926, subsequently obtaining the degree of M.A.
In that year he joined Imperial Chemical Industries as assistant research engineer at Billingham, in which capacity he was closely concerned with problems arising from the working of the Synthetic Ammonia and Nitrates Process, being an original member of the committee for the investigation of special stress problems. He contributed an article to Engineering on "The Calculation of Temperature Stresses in Tubes". After two years in the company's head office in London he returned to Billingham as chief engineer of an ancillary company manufacturing cement and plaster board.
From 1940 to 1945 he was works engineer at the Ministry of Supply's factory in Blackpool. His final position was that of assistant chief engineer at the Wilton Works of Imperial Chemical Industries, Middlesbrough, his death occurring in October 1950. He was elected an Associate Member of the Institution in 1928."