Ennis ready to focus on World Championships

British heptathlete Jessica Ennis says she will not let anticipation about London 2012 distract her from preparations for August's World Championships in South Korea.

Ennis missed seven weeks of full training earlier this year with an ankle injury, but returned to action in May with a win in Austria and also impressed at Manchester's Northern Athletics Outdoor Championships in June.

The reigning world champion also gives her thoughts on Twitter and the way tickets for next year's Olympics have been allocated.