Lift up the wire handle then undo the lamp retaining screw. This is a captive screw which remains in the lamp assembly.

Lift out the lamp, holding it only by the wire handle. Place the lamp in a clean polythene bag and set it aside in a safe place.

Caution: Do not touch any part of the lamp with your fingers, apart from the handle and the top cover. Finger grease on any glass parts is likely to shorten its life, and could cause it to explode.