What UK running race featured T12/13 event winner El Amin Chentouf?
El Amin Chentouf:  Outside the Paralympics, Chentouf is also a world series Marathon champion, winning the T12/13 event at three London Marathons. London Marathon: The London Marathon (presently known through sponsorship as the Virgin Money London Marathon) is a long-distance running event held in London, United Kingdom, part of the World Marathon Majors.
London Marathon