The project was for a Halloween Special depicting '13 Ways to Slay your Home's Energy-Sucking Vampires'. Butcher Billy was happy to get his hands bloody for the job, illustrating themes such as 'Reduce energy-sucking spectres by waiting until you have a full load before turning on the washing machine', 'Avoid financial frostbite and consider investing in a new energy efficient model if your fridge is more than 10 years old' and 'Claw back money easily by swapping all bulbs for an energy efficient brand, such as the Hive Active Light bulbs'. See more here.