The present invention relates to a safety apparatus for use in a procedure comprising at least first and second devices wherein the first device and second device are for use in a medical procedure the apparatus comprising a disabling mechanism that is adapted to releasably retain and thereby prevent use of the said second device until release by a release procedure using the first device. The invention further relates to a method of carrying out a procedure comprising the steps of using the first device applying the first device to a disabling mechanism to release the second device and using the second device.