Aidan O'Brien recorded a double at the Dubai World Cup thanks to wins for ' Lines of Battle ' in the UAE Derby and ' St Nicholas Abbey ' in Dubai Sheema Classic. 

And Davy Russell will miss the Grand National meeting at Aintree after failing to gain medical clearance from the British Horseracing Authority as a result of the injury he sustained at the Cheltenham Festival. 

©INPHO/Lorraine O'Sullivan