D A Willetts: solargraph 1 (Original colours)
D A Willetts: solargraph 1 (Reversed colours)
D A Willetts: solargraph 2 (Original colours)
D A Willetts: solargraph 2 (Reversed colours)
D A Willetts: solargraph may 2015 1 month (positive)
D A Willetts: solargraph may 2015 1 month (negative)
D A Willetts: solargraph june 2015 to feb 2016