I have now officially stopped file copying services at TNA (final answer: effective immediately, no going back). I can recommend an alternative service (no link to me, usual disclaimer) which has a well established and economical copying facility: https://www.arcre.com

I started FilePhotoService as a result of seeing the issues members of RAFCommands had with getting copies and research from Kew at reasonable prices. I am glad to say that it has been useful to quite a few members over the years and it has certainly taken me in many new directions. I will still carry out research and it is only the file copying that must stop, but I am confident that https://www.arcre.com is worth trying.