I post pix from Flickr. Took a while to sort it out. View a photo at Flickr.
Lower right you see the unlabeled "Share" right turn arrow. Click that.
There you'll see "Code" and under that "HTML", "Link", "BBC Code".
Select BBC Code. Copy and paste that link into a "rich text" version of the Forum post and you should be good to go.
You can try it out in the Test Forum.