Domestic Championships Record
1999 – AAA Indoor Championships high jump bronze
2000 – AAA Championships high jump bronze
2001 – AAA Championships 400m bronze
2002 – AAA Championships 400m gold
2004 – AAA Championships 400m silver
2005 – AAA Championships 400m hurdles silver
2006 – AAA Championships 400m hurdles silver
2007 – Norwich Union World Trials 400m hurdles silver
2008 – Olympic Trials 400m gold
2009 – CAU Inter-Counties Championships 200m gold
2010 – Aviva European Championships & National Championships 400m gold
2011 – Aviva World Trials & UK Championships 400m 4th
2012 – Aviva Olympic Trials & UK Championships 400m bronze
2013 – Scottish National Indoor Championships 200m gold

Major Championships and International Record
2012 – Olympic Games 400m 7th sf, 4x400m 5th. European Championships 400m 5th, 4x400m 4th
2011 – IAAF World Championships 400m 7th sf, (4x400m 4th). European Indoor Championships 4x400m silver
2010 – European Championships 400m 4th ht, (4x400m silver)
2009 – World Championships 4x400m 4th. Spar European Team Championships 400m bronze
2008 – Olympic Games 400m 6th sf
2007 – World Championships 400m 5th sf, (4x400m bronze). European Indoor Championships 4x400m bronze
2006 – European Championships 400 hurdles 5th sf (4x400m 4th). Commonwealth Games 400m hurdles bronze, 400m 4th, 200m 5th
2005 – World Championships 400m 6th sf, (4x400m bronze). European Indoor Championships 4x400m bronze
2004 – Olympic Games 400m 8th sf, (4x400m 4th)
2003 – World Championships 400m 7th, (4x 400m 6th)
2002 – European Championships 400m bronze, (4x400m 4th). Commonwealth Games 400m silver, )(4x400m 4th)
2001 – World Championships 4x400m 5th. World University Games 400m 6th (4x400m silver)
1999 – European U23 Championships 4x400m bronze

Having started off her athletics career as a high jumper with a PB of 1.88m she soon switched to the 400mm where she made rapid progression. In 2002, the Scot won individual medals at the Commonwealth Games and European Championships over 400m, and was fourth in the World Cup, setting a lifetime best of 50.82. The following season she enhanced her reputation as being a championship performer by reaching the final at the World Championships in Paris, placing seventh.

After reaching the semi-finals at the 2004 Olympic Games, she decided to switch to the 400m hurdles but despite having the potential to be a world-class exponent at that discipline, the switch did not fully materialise but he did win a Commonwealth bronze medal, setting a lifetime best of 55.25. McConnell still remained an invaluable member of the British 4x400m, greatly contributing to successive bronze medal winning performances at the World Championships but she was not fit for the Olympic Games 4x400m relay in Beijing, having to withdraw through injury.

2009 started off well for her, but injury curtailed her performances and although a member of the 4x400m relay squad at the World Championships it was not unil her last race of the season in the Shanghai Grand Prix that she managed to run somewhere near her potential with a season's best of 51.45. 2010 started brightly with a convincing win in the European Championships Trials at Birmingham, but a below-par run in the championships in Barcelona where she finished in fourth place in her heat and was also just outside of the medals at the Commonwealth Games in Delhi.

She studied PE and Sports Science at Loughborough.