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British Rail Engineering Limited (BREL) was the railway systems engineering subsidiary of British Rail. Established in 1970, the maintenance arm was split as British Rail Maintenance Limited in 1987, and the design and building of trains was privatised in 1989, purchased by the Swiss-Swedish conglomerate Asea Brown Boveri (40%), Trafalgar House (40%), and a management-employee buy-out (20%). After ABB became the sole shareholder in September 1992, it was subsumed into ABB Transportation.