Do collected 'recycled' materials really get dumped in landfill sometimes?

The materials collected in the Highlands for recycling are sent to various reprocessors to be turned into new materials. Highland Council have received good feedback from all of their reprocessors about the quality of the materials they send to them. Depending on the market at the time, the reprocessors will find the best value option for recycling the different materials -  this might be in the UK or overseas but it will be recycled. The only time a local authority will send materials collected for recycling to landfill is if the material is contaminated with another material which has made it difficult to recycle.