It sounds like a sitcom plot, but according to the Associated Press, this really happened. A British man had forgotten to book a hall for his wedding.

It worked in a way because the bride was left standing in the street wearing her wedding dress as the building was evacuated and the wedding didn't take place, but it failed in that the man, identified as Neil Mcardle by the AP, got caught, got convicted, and got sentenced to twelve months in jail. That part probably wouldn't have happened in the sitcom version. In case you were wondering, the couple is, believe it or not, still together, though they still aren't married.