CRBA / 1st Passport Photos

Hi guys,

My mom finally managed to book us an appiontment to get my son's CRBA and 1st passport at the London embassy.  As it was such short notice, we're in a mad rush to get everything together today as it's at 8AM tomorrow morning.

We are struggling to find anywhere which prints a 2x2 inch photo for his passport.  Do they have US photo printing services at the embassy?  If not where can we find someplace to get it done?  Tesco doesn't do 2x2 inch, Boots I don't even think does 2x2 inch.

Yes they have a photo machine at the embassy.

I do think all the machines at supermarkets or snappy snaps, etc will do any size.

But embassy will be easiest.