Recycle: Junk mail can be recycled at any recycling centre or put in your recycling waste.
Reuse: Donate mattresses in good condition with fire safety labels to larger charity shops or furniture reuse schemes. Find your nearest charity shop that will collect using Reuse Essex, or list your item on Freegle or Freecycle for someone to collect.
Recycle: Your local council may collect mattresses as part of their bulky waste collection scheme, but they may charge. You can also take mattresses to a recycling centre.