Wood slats/planks for garden bench (Hillingdon UB10)

I am restoring a garden bench and need a few pieces of wood 4 feet long (can be bit longer, but not shorter), between 2 and 4 inches wide and 1/2 to 3/4 inch thick. If anyone has some lying around in shed that they don't need it would be most welcome. I can collect at a mutually agreed time within Hillingdon area.