The invention relates to a seat, backrest, lateral support bracket, and footrest that are able to be adapted to suit the needs of a physically disabled user. In general, the seat comprises a base frame, a seat base that is supported by the base frame, and a backrest. The backrest may be adapted to tilt with respect to the seat base and comprises a backrest angle adjustment system including a vertically extending angle adjustment slot located centrally on the backrest support and a pair of links pivotally attached to the seat frame and the angle adjuster wherein the angle adjuster comprises a lock with a projection through the angle adjustment slot and a fastener that engages with the projection.
