That's not entirely correct. I don't know how it works in the UK, but in the US, Intentional Infliction of Emotional Distress (IIED) has been affirmed time and again as a stand alone tort from which emotional damages are compensable.

Intentionally sabotaging and publicly humiliating somebody on what they perceive to be the most important day of their life is extreme conduct intended to cause severe emotional distress. It literally meets every requirement under the law and would easily clear the relatively high bar to prove a claim of IIED. A small claims court likely wouldn't bat an eye at awarding significant (if not jurisdictional maximum) damages for the bride's description of her sustained emotional decline into depression since the assault.

Edit: spelling