In the sanctuary is a rather stark example of stone sedilia.
Inside the church, an ornately decorated sedilia survives, where a bench was enclosed under a single arch.
Right of the chancel are the 3 sedilia seats for the medieval mass, in which the priest, deacon and sub deacon sat.
The choir has not only the tomb but a matching piscina and sedilia and a richly framed sacristy door.
The church of St Andrew, Heckington, is the best example of Decorated architecture in the county; it is famed for its Easter sepulchre and fine sedilia.
The piscina and sedilia in the south wall are of the same date and nearby is an inserted 14th-century window.
The piscina and the triple sedilia are both 14th century.
There are in the chancel two freestone effigies, perhaps of the r4th century, besides three sedilia, and a piscina under arches.