Between 2017 and 2018 Historic England undertook a survey and investigation of the ruins of All Hallows' Church and surrounding earthwork remains within the park of Birdsall House. The survey of the ruins included REDM survey, laser scanning and drone survey to produce a 3D model and ortho images of the plan and elevations. Detailed visual inspection of the surrounding earthworks and of the fabric of the ruins was also undertaken. The upstanding ruins of the church comprise four principal components: the partial remains of a 12th-century wall between the chancel and nave with arch; a 14th century internal arcade, separating the nave from the former south aisle; a heavily re-built and re-modelled tower and a section of the exterior west wall. The church was in use until 1824 when a replacement church was built 600m to the North. The church was then adapted to form a picturesque ruin, within the gardens of Birdsall House. The fabric has evolved over a number of centuries leaving evidence of a sequence of phases in different architectural styles. The unusual position of the tower within the nave of the church is one of All Hallows' more unusual features. Far from being a later feature, it certainly formed part of the church prior to its abandonment.
Gould et al. (Wed,) studied this question.