A surgical apparatus for use by a surgeon during a surgical procedure comprising: a sealed sterilized surgical pack comprising: a plurality of surgical instruments; and a surgical tray being substantially shaped to fit around a body part of a patient and comprising: a top surface configured to be part of a sterile field of a surgical procedure; a plurality of receiving structures located on the top surface, each of the plurality of surgical instruments removably positioned in a corresponding one of the receiving structures; at least one electrical connector, at least one of the plurality of surgical instruments being connected to the at least one electrical connector; at least one fluid connector, at least one of the plurality of surgical instruments being connected to the at least one fluid connector; and a side or bottom surface configured to be outside of the sterile field, the side or bottom surface comprising a control unit receiver, the control unit receiver being electrically coupled to the at least one electrical connector; and a control unit configured to be received into the control unit receiver after the surgical pack has been opened, the control unit configured to power and control operation of at least one of the plurality of surgical instruments; wherein the tray further comprises a receiver for receiving a container of fluid; characterised in that the receiver comprises a spike and a light positioned within the recess for shining light through the container of fluid to indicate a fluid level to the surgeon. a plurality of surgical instruments; and a surgical tray being substantially shaped to fit around a body part of a patient and comprising: a top surface configured to be part of a sterile field of a surgical procedure; a plurality of receiving structures located on the top surface, each of the plurality of surgical instruments removably positioned in a corresponding one of the receiving structures; at least one electrical connector, at least one of the plurality of surgical instruments being connected to the at least one electrical connector; at least one fluid connector, at least one of the plurality of surgical instruments being connected to the at least one fluid connector; and a side or bottom surface configured to be outside of the sterile field, the side or bottom surface comprising a control unit receiver, the control unit receiver being electrically coupled to the at least one electrical connector; and a top surface configured to be part of a sterile field of a surgical procedure; a plurality of receiving structures located on the top surface, each of the plurality of surgical instruments removably positioned in a corresponding one of the receiving structures; at least one electrical connector, at least one of the plurality of surgical instruments being connected to the at least one electrical connector; at least one fluid connector, at least one of the plurality of surgical instruments being connected to the at least one fluid connector; and a side or bottom surface configured to be outside of the sterile field, the side or bottom surface comprising a control unit receiver, the control unit receiver being electrically coupled to the at least one electrical connector; and a control unit configured to be received into the control unit receiver after the surgical pack has been opened, the control unit configured to power and control operation of at least one of the plurality of surgical instruments; wherein the tray further comprises a receiver for receiving a container of fluid; characterised in that the receiver comprises a spike and a light positioned within the recess for shining light through the container of fluid to indicate a fluid level to the surgeon.