Division (2) BPB, Knauf, Lafarge and Gyproc entered into and participated without interruption in a complex and continuing agreement contrary to Article 81(1) of the Treaty which was manifested in the following conduct constituting agreements or concerted practices:

the representatives of BPB and Knauf met in London in 1992 and expressed the common desire to stabilise the markets in Germany (hereinafter: German market), the United Kingdom (hereinafter: UK market), France (hereinafter: French market) and the Netherlands, Belgium and Luxembourg (hereinafter: Benelux market),

the representatives of BPB and Knauf established, as from 1992, information exchange arrangements, to which Lafarge and subsequently Gyproc acceded, relating to their sales volumes on the German, French, UK and Benelux plasterboard markets,

the representatives of BPB, Knauf and Lafarge exchanged information, on various occasions, prior to price increases on the UK market,

in view of particular developments on the German market, the representatives of BPB, Knauf, Lafarge and Gyproc met at Versailles in 1996, Brussels in 1997 and The Hague in 1998 with a view to sharing out or at least stabilising the German market,

the representatives of BPB, Knauf, Lafarge and Gyproc exchanged information on various occasions and concerted their action on the application of price increases on the German market between 1996 and 1998.