The email I received said:

• Did you know anyone 75+ is entitled to absolutely free upgrade to green energy to heat home, which is better for the world and cheaper to run!  This is a really important fact to get out there maybe you or your parents or friends could really benefit from this. There will hopefully be a resident from Cardross who has benefited from this and will share her experience. 
• Interest free Grants are available to upgrade your home. Again this is a huge incentive and as the green energy is cheaper than fossil fuels it makes sense in those houses that are suitable.                                                                                                                                                                                                                                    
• There will be professionals from various charities available to answer questions and take details incase you may be interested but need more information.