An electrosurgical apparatus for coagulating tissue comprises an elongated tube (6) having a tubular wall (13) and a proximal end and a distal end, and an elongate sheath (3) into which the tube (6) is inserted. The tube constites a conduit (11) though which ionisable gas can be supplied to the distal end of the tube. The tube includes one or more apertures (20) in the tube such that the ionisable gas is capable of exiting the tube in the region of the distal end of the tube. An intermediate sleeve (14) is provided into which the elongated tube (6) is inserted, and a tube handle (17) is attached to the proximal end of the tube. A sleeve handle (18) prevents the sleeve (14) from rotating, such that actuation of the handle (17) causes the flexible elongated tube to rotate within the intermediate sleeve (14).
