Such common architectural features among these tomb-shrines indicate a strong regional cohesion with no direct parallels elsewhere in the British Isles. For instance, they would have been taller than most other tomb-shrines in Britain, with internal heights of up to 10 ft. Nevertheless, as with other regional groupings of Early Neolithic tomb-shrines (such as the Cotswold-Severn group), there are also various idiosyncrasies in the different monuments, such as Coldrum's rectilinear shape, the Chestnut long barrow's facade, and the long, thin mounds at Addington and Kit's Coty. This variation might have been caused by the tomb-shrines being altered and adapted over the course of their use; in this scenario, the monuments would represent composite structures.