Glad you got the info you wanted.
I have had some bad photos from booths and so now use Max Spielman for passport or Visa applications.
Just in case anyone on Wikki does not like the booth photos:
The girl is really helpful in their Renshaw St Liverpool Branch and waited until she got a decent photo before printing it out. Also she gave me Visa photos a different size and background, and knows what photos are required for what and how to get the result required for sending off with applications.