The service is exceedingly stupid. You have to submit two physical photographs, one of which is then scanned in. And the requirements are pretty strict, has to

The service is exceedingly stupid. You have to submit two physical photographs, one of which is then scanned in. And the requirements are pretty strict, has to be the exact size and your head has to be in a narrow band of scale and position. Typically costs $US15 (GBP12) to get them done on the spot at a private photo provider, for something that should be completely free.