Reaction from the 4 x 400 metres relays on the final day of the IAAF World Championships in Beijing, China, on Sunday. There’s been a lot of emotions this week, really proud of the @BritAthletics team! Looking forward to seeing my baby! pic.twitter.com/jy8u358Fqw — Martyn Rooney (@MartynRooney) August 30, 2015