You only need to have one fluorescent light fitting in your business premises to be classified as a producer of hazardous waste, and therefore need to register as a Hazardous Waste Producer. This needs to be done annually, although the cost is modest.
Common items classified as hazardous under the Hazardous Waste Directive 2005 include fluorescent tubes and lead acid batteries. If any of your contractors dispose of these items on your behalf, then they will also need to be registered, and consignment notes are required to cover all movements.
You can find full details on the Environment Agency's website.
