PHOTO-ME, which makes the instant photograph booths, offers hints for passport pictures:

Adjust the height of the seat to allow you to obtain the correct eye-level.

Choose a less distracting background by pulling back the curtains.

Avoid the 'rabbit-caught-in-the-headlights' look by relaxing your facial muscles and letting your eyelids droop slightly.

Swing the lower half of your body around so that both knees rest against the side of the booth; keep them there and turn full face to the camera. 'You've now created a much more three-dimensional appearance for your features, and emphasised the contours of your neck and face. The result is far more flattering than the traditional identity-parade shot we're all familiar with.'