Also at Martlesham Heath is BT's Research and Development Centre, now called Adastral Park.

Of particular note was the 19th century find of a small bronze statue of a horse on a plinth, bearing a Latin inscription indicating that this was an offering dedicated by a woman named Simplicia to the god Mars.

Martlesham remained a strongly agricultural area, but the main settlement shifted over the years from the highest ground (where the church and hall are situated) to the point where the main London to Great Yarmouth road crosses the River Finn [citation needed], a tributary to the Deben.

White's 1844 directory of Suffolk describes Martlesham as "a neat village near the confluence of a rivulet with the Deben" and states that it has in its parish "510 inhabitants, and 2,558 acres (1,035 ha) of land, partly in rich marshes washed by the tides of the Deben, and partly a large, sandy, and unenclosed heath, extending about 2 miles (3.2 km) S.W., and affording pasturage for numerous herds of sheep and cattle."

This coaching inn was used as an overnight stopover for the Royal Mail, with the post being safely locked up until the morning.

The figurehead was a well-known landmark with "Red as the Martlesham Lion" being a common expression in the area.

School Lane marks where the former schoolhouse stood together with plenty of open fields with a view to the creek.