The B.A.A. uses a timing tag attached to the back of your bib number to score all B.A.A. races. This bib number with timing tag must be worn on the front of your running jersey or outermost garment from start to finish in order for you to be recognized as completing the race and receiving an official finish time. It is important that your bib not be forcefully bent, creased, or heavily wrinkled, as damaged timing tags may not work on race day. The timing tag identifies your bib number and should not be worn by any other entrant. All you must do is wear the bib; computers do the rest.
Bibs
Results
What is a timing tag and how is it used in the B.A.A. races?