Hello, Dagwood
Thank you for the report for your friend.
There is only one strong signal in the green, none in yellow, 4 in the red, and the rest in grey are very weak. Doesn't look very promising.
I can do a terrain profile for you. Please send me his address in a PM and tell me what channel it is for, so that it will be accurate.
Is his house surrounded by trees like your house is?