Whittle won at the European Athletics Championships 1986 in Stuttgart common Derek Redmond, Kriss Akabusi and Roger Black, the gold medal in the 4 x 400 - meter relay. He had his turn to run on only one shoe, having lost the other in the adoption of the baton of Abukasi. Nevertheless, the British team succeeded with a time of 2:59,84 min, a championship record.
In the Indoor Athletics Championships 1988 in Budapest Whittle finished second in the 400 -meter run. In the same year he took part in the Olympic Games in Seoul. With the British 4 x 400 - meter relay team, he finished in fifth place, about 400 meters he reached the semifinal round. In 1989, he again won a silver medal in the 400 -meter run at the Indoor Athletics Championships in The Hague. Two weeks later he was at the IAAF World Indoor Championships in Budapest over the same distance in fifth place. At the 1990 Commonwealth Games in Auckland he finished with the Scottish team to second place in the relay.
Meanwhile, Whittle tried intensified in the 800 -meter run, albeit less successful than at half the distance. At the World Athletics Championships 1991 in Tokyo, he missed the finals, at the Indoor Athletics Championships in 1992 in Genoa, he finished sixth. His international career Whittle graduated from his second European title. At the European Athletics Championships in Helsinki in 1994, he won along with David McKenzie, Roger Black and Du'aine Ladejo in the 4 x 400 - meter relay.
Brian Whittle is 1,90 m tall and weighed 77 kg in his playing days. He is married and has three daughters.