That has been a running joke in British boxing for nearly three decades. In case you did not know, McCarthy (the fighter attacked by Wilson's mother), was Dq'd for refusing to continue.
No I did not know...accidentally found this when looking for something else. I will have to look at the story sometime unless you wanna fill us in
This makes it even funnier http://www.weirdboxing.info/boxings-strangest-bouts/steve-mccarthy-v-tony-wilson