Great Britain. Rural Architecture. Issued 11 February 1970. All four values exist missing phosphor. In addition to various subtle missing colour errors, the 5d exists missing grey (the Queen’s head and cottage shading) – just five such examples are recorded. The 1s 6d exists with turquoise-blue (the grass) virtually missing; six examples from the last row of a sheet are known to have been affected. Other varieties from the set can be found here.