A surgical device, comprising: an elongated shaft (20) having a first coupling (26) and a surgical instrument (250,2250) including at least one movable element (256,2256,264,2264), the elongated shaft including at least one rotatable drive shaft (30,32) configured to effect movement of the at least one movable element characterised in that the surgical instrument has a second coupling, the second coupling being complimentary to and configured to couple with the first coupling wherein the elongated shaft is configured to be inserted into a body via a first orifice and the surgical instrument is configured to be inserted into the body via one of the first orifice and a second orifice and wherein the elongated shaft is configured to be-coupled with the surgical instrument via the first coupling and the second coupling after the elongated shaft is inserted into the body via the first orifice and after the surgical instrument is inserted into the body via the one of the first orifice and the second orifice.
