Hampshire & IoW Police Commissioner Donna Jones is encouraging responses to the consultation on household DIY waste disposal charges. She endorses the view that removing such charges would tend to reduce the incidence of fly tipping. Whatever your position on the matter, why not go ahead and respond to the DEFRA consultation.
https://wrap.org.uk/resources/report/relationship-between-fly-tipping-rates-and-hwrc-charging
Worth reading an independent report showing that there is no link between charges at HWRC and fly-tipping