Energy devices for use in medical and surgical procedures; energy devices for providing radiofrequency energy, microwave energy, millimetre wave energy, direct current energy, ultrasound energy, radiofrequency energy, bipolar radiofrequency energy, thermal plasma energy or non-thermal plasma energy for use in medical and surgical procedures; diagnostic devices for use in medical and surgical procedures; needles, catheters and instruments for use in medical and surgical procedures; medical and surgical apparatus and instruments.