A demountable implement (10) for a vehicle has a mounting arrangement (16) for mounting the implement onto a vehicle. The implement is selectively jettisonable from the vehicle and jettison members (42) for jettisoning the implement are provided on or by the implement.

A demountable implement (10) for a vehicle has a mounting arrangement (16) for mounting the implement onto a vehicle. The implement is selectively jettisonable from the vehicle and jettison members (42) for jettisoning the implement are provided on or by the implement.