At a guess, TEC used the link of the page that the image was on, and that page was somewhere on Virgin's servers, and protected by a password.
Assuming that we would be "alllowed" to see the image, you probably need to get the URL of the image, not the page.
If you right click on the image, and select an option like "Properties", there will be an URL of the image itself, which will often (but not always) end in .jpg or .JPG.
That's what you need to copy into a post, and click on the Image icon (as described by Roger earlier).
It may be easier to use a free account on one of the services like PhotoBucket, Picasa, Flickr etc rather than Virgin's own web site, if you don't know how to drive that. The other services are widely enough used that people can provide specific advice.