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    BS EN 771-3

    Ibstock PLC
    Thornley Factory
    Salters Lane
    Durham
    Shotton Colliery
    DH6 2QA
    United Kingdom
    BSI logo

    Certificate Number: KM 07754
    Scope: Specification for masonry units - Aggregate concrete masonry units (Dense and light-weight aggregates)

    Original Registration Date Effective Date Last Revision Date Expiry Date
    1987-11-01 2023-10-04 2023-09-07 2026-10-03