Inverness modern pentathlete Mhairi Spence is aiming to upgrade double silver into double gold at this year's World Championships.

Spence won team silver and team relay silver in Hungary last year and is hoping home advantage will inspire her when London stages the event in 99 days time.

The event, which takes place at the Crystal Palace National Sports Centre, is the first World Championships in an Olympic sport to be held in London since 1986.

The World Championships run from Thursday 13th August through to Monday 17th August and will also be the first World Championships to feature the sport's new combined run/shoot format.

"I'm really excited about the World Championships," said Spence.

"It's great to have a major championships in your own country, particularly ahead of 2012. Hopefully it means we will get lots of home support."

Peter Hart, Pentathlon GB chief executive, added: "The World Championships are an important milestone in our preparation towards the London 2012 Olympic Games, both for athletes and officials.

"It is also exciting for us to host the first World Championships to feature the sport's new format."