This is a dispute about fibre-cement roof slates. The second claimant ("Dansk") is a Danish company and the parent of a multi-national group of companies which together form one of the largest producers of fibre-cement slates in Europe. The first claimant ("Cembrit UK") is a wholly owned subsidiary of Dansk and is responsible for the sale in the UK of fibre-cement slates made by the Dansk group. The first defendant is a roofing contractor and the successor to the firm Apex Roofing Services (collectively, "Apex"). The second defendant, Mr Leader, is a member of Apex.

http://www.bailii.org/ew/cases/EWHC/Ch/2007/111.html