 From 1956 Thomas Hill (Rotherham) Ltd, THR, sold Hibberd locomotives to non-Hibberd customers on an informal commission basis until 1960.The relationship ended because Hibberd were becoming worried that THR would sell their own locomotives to customers in preference to the Hibberd product.The company was acquired by Butterley Engineering in the early 1960s and in 1964 production was moved to Ripley, Derbyshire.