Hi Revd Simpson,
I checked that image and there is no information regarding whether rights are reserved by the person who uploaded it or whether it is public domain.
Although WikiTree policy is that copyrighted material is not permitted here without express permission of the owner and it is supposed to be noted on the image's page, unfortunately sometimes copyrighted information does get added here by people who don't realize that what they are doing is not right.
The person who uploaded that image is a very active and also very experienced member of WikiTree, so I would anticipate that he is the owner of the photograph and is likely to be happy to allow you to use it.
I recommend that you contact him by private message, which you can do HERE.
Thank you very much for asking - we really appreciate that!