Rejected takeoff is nothing to report in public. Many each day around the world. Sort the problem, wait for the brakes to cool if necessary, bit of paperwork and on we go.
A quick look at the Jan 2002 logs for Heathrow shows BA39 to Beijing operated on Monday, Wednesday and Saturday. Flights in the period Jan 1-16 2002 had actual takeoff times of, in sequence, 1737, 1722, 1724, 1718, 1712, 1934, 1718. That one two hours after all the others is a likely candidate, it was Monday 14 January. The aircraft was G-YMML. You will be glad to know it is still very much around.