From the Government Website:
Wrap up your home this winter
Make your home warmer and your energy bills cheaper with a Green Homes Grant.
Homeowners in England, including landlords, can get up to £5,000 to pay part of the cost of energy saving measures like insulation. Low income households can get 100% of the costs of work covered up to £10,000.
Make sure you’re one of the 600,000 households who could save up to £600 a year on energy bills by applying today. Installing energy efficient home improvements also cuts emissions, which is better for the environment.