Midland Railway signals usually comprised a tapered wooden post, a lower quadrant arm, a round-case lamp (with lampman's platform), and a spiked finial (as in kit S4/KM5). After the grouping, the LMS modernised many of these signals by fitting upper quadrant arms and a new lamp (as the lamp moved to the opposite side of the post, the lampman's platform was redundant, and was usually removed). Many signals also received the ex-LNWR design of post cap, as shown in the drawing, and this revised design was used for both new installations and renewals until the advent of tubular steel posts in the mid-1930s. Some examples are still in use on Network Rail today.

The kit can be built as a home or distant signal in any height up to 24ft (height of arm above rail level - the post supplied is 27ft tall). The LNWR-pattern post cap is included.

The kit is designed for mostly soldered construction, but Araldite or superglue can be used in more places, particularly if the finished signal is not intended to operate. Some simple marking out, cutting and shaping of parts is required. To see exactly what is involved in constructing this kit, download the instruction sheet as an Adobe Acrobat® file (115kb).