To mwheattree ... The pictures referred to in this thread are American Army.
This isn't a picture, but it's how and where you can apply for a copy of your dad's service record.
https://www.gov.uk/requests-for-personal-data-and-service-re...The Royal Engineers has a museum and library in Gillingham in Kent, they don't hold service records for individuals, you can only get those from the link above, but they do have information about units, and you never know, if you can identify your dad's unit or units, you might be able to find a pic, and you may be able to find where and when his unit served and what they did.
http://en.wikipedia.org/wiki/Royal_Engineers_Museum ...
http://www.re-museum.co.uk/