A retaining clip (4) comprising a substantially planar annular sector portion (14) with a sector angle of over 180° and having a recess (15) at each end of the sector arc. Also, a retaining ring comprising a pair of the retaining clip (13), wherein the recessed ends cooperate such that the pair of clips form a complete annulus. Also, a method of installing a retaining ring in a groove formed in a component, comprising inserting a first retaining clip into the groove in a substantially radial direction from a first side of the groove, an inserting a second retaining clip into the groove in a substantially radial direction from a second side of the groove opposite the first.