all you have to do to make a URL clickable (that's the lkink that starts with html or some version of it) is to add a space at the end of the link. It will automaticaly turn it into a link
You can also do the following
highlight and copy the URL
type in the name of the link and highlight the words "BBC-Child abuse" in this case
2 new links will appear on the posting toolbar They should be right after the UNDO and REDO icons
click on the first one and a screen will pop up Paste the URL into the first line and click on INSERT at the bottom of the screen
Your link will be clickable BBC-Child abuse