Most photographic stores will do passport photos for around £5 per set. The advantage with using their service is they use the `approved` sizing tools and will replace free-of-charge in the event of rejection. The place I used was also prepared to refund the £5 as well as replace if rejected - needless to say they weren`t.
Xp or Visa print wizard will do passport size photos, but I agree that getting them done by people who know is better, otherwise your documents just get rejected... This has already been asked too; click here
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