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The TO will discuss disciplinary action against Weardale Building Supplies, based in Barnard Castle, at a hearing on 23 October.
At an inquiry on 23 October, the TO will consider disciplinary action against Batley-based Three Waste Solution.
An inquiry on 29 October will discuss disciplinary action against Gateshead-based Raiken Wholesale.
A PI on 30 October will look at disciplinary action against JF Plant Tyres based in Brough as well as the transport manager's repute. The firm will also submit a variation application.