Downing Street says Wormald to stand down but does not announce replacement ...

A new study says genetic testing can speed the return of the American chestnut tree that once dominated Eastern U.S. forests.

Ulster duo Robert Baloucoune and Cormac Izuchukwu will make their Six Nations debuts as part of a much-changed Ireland side for Saturday's game against Italy in Dublin.

India face Namibia in the ICC T20 World Cup in Delhi - follow live scores, radio commentary and video highlights.