Eventually I filled in the online contact form and stated that I need their email address - and up pops an automated message to say that if I need to send photos an email address would be sent. (The hoops one has to jump through! And I am trying to help!)
That was two days ago. I'm still waiting for a reply, although I accept that it is the weekend in a holiday period so things might move slowly.
Update: I have now had a response from CRT so I have emailed them the photos.