Founded in 1946, this Shropshire aluminium and iron castings business is led by brothers Matthew and James Grainger, 50 and 48 respectively, and remains family owned. It supplies the motorsport, defence and aerospace industries and has developed complex engine block castings for demanding customers, including Formula One teams, Aston Martin and Bentley. Exports reached £20.4m in 2013 and markets include America, China and the EU.
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