Division (3) The undertakings concerned participated in the infringements for the following periods:
United Kingdom
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BPB: from 31 March 1992, at the latest, to 25 November 1998,
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Knauf: from 31 March 1992, at the latest, to 25 November 1998,
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Lafarge: from 31 August 1992, at the latest, to 25 November 1998,
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Gyproc: from 6 June 1996, at the latest, to 25 November 1998.