As an approved contractor since the inception of the Marshall's register with an annual spend of over £100k for over 30 years, there has been a noticeable steady increase of defective and sub standard products. Low density crumbling blocks that don't dry out. Colour issues. Crumbling edges, damages major thickness variations etc. Complaints not properly dealt with. Calls to major management players unanswered. These problems have cost my company thousands in loss of profit and costs and have become more and more acute over several years. I have had on site meetings with management admitting production quality issues but they do not act on the problems. There are jobs that have been relaid that still require attention. Time to change supply to other manufacturers. BUYERS. BEWARE!