I note you are a Trainee, so I hope this isn't a have! By carrying out a survey of your proposed to be chased wall.
In a domestic property, pipes and cables concealed in plaster walls are generally done for aesthetics, to feed or supply sockets, radiators or other features. So for example, cutting a chase above a radiator is fraught with danger. However, if you are to cut a vertical chase down a wall devoid of any feature, a check of the ceiling void above said proposed chase should reveal any hidden pipes/cables; it is unusual (but not without possibility) for any service to be horizontally in the middle of a wall devoid of features. If in any doubt, one could use a multi detector, although they are not infallible. I suspect many have cut through a hidden pipe or cable, but then that's part of life's rich tapestry.