South porch has angle buttresses ending in crocketted pinnacles and a 4-centred arched opening and original early C16 studded door behind.
Nave has fine roof of c.1520 with cambered tiebeams on stone corbels, with moulded beams in panelled ceiling with gilded bosses.
To north is Jesus or Trafford Chapel with effigies of Humphrey Newton and his wife, died 1536 with cusped, agee hoods.
Also tomb of Henry Trafford, died 1537.
Under the chancel is a crypt chapel of c.1300 reached by spiral stone staircase.
It has a triple sedilia with 2-centred arched heads, one with a rough carving of a cross. (Pevsner and Hubbard).