London, Oct 19: A boxer has knocked his opponent out in 13 seconds, including the referee's count of 10, to record the fastest knock-out victory in British history.Daniel James, a 23-year-old stable lad, connected with a perfect left hook on and floored Steve Tuckett on Saturday to extend his record to 10 professional wins.The light-welter weight said: ``I got off my stool and. just threw the punch. It hit Steve flush on the chin, he went down flat on his back and I knew at once that it was a good one.''