A thank you email from Graham Jones in souni for his central heating

Steve I would like to say on behalf of Derek to you and your pal Graham, thanks for a good job and have passed on your card to one of the other residents in Country Rose.  I am trusting that when it comes to using the system in ernest all will work well.  Have also advised Derek that he or the new residents should contact you when they come to purchase the first fill of gas, so the gas tank and system can be purged correctly and safely Thanks again Graham