British swimming star Jo Jackson believes her experiences of the Beijing Olympics four years ago will stand her in good stead in London.

Jackson earned a bronze medal in China in 2008 before adding to her honours with a double silver medal haul at the World Championships soon after.

However, since then, her progress has been hindered by a rib injury caused by asthma, casting doubts over her participation at this year’s Games.

But the 25-year-old qualified last month for the 400m freestyle and is now one of the most experienced members of the GB team.

“I remember at my first Olympics I was the youngest person on the team and I’m now one of the oldest,” she said.

“I’ve picked up a lot of experience over the past few years and that includes massive highs and lows.

“The fact that you’ve been through every emotion possible over the past few years definitely helps going into the Olympics.

“I remember at my first Olympics I was so nervous and didn’t know what to expect. It felt very surreal.

“Now I know what to expect and what will happen at an Olympics.

“I’ve been to every competition in the calendar so I know all about the challenges. I just can’t wait to swim now.

“This is a once in a lifetime opportunity and I’m so proud and privileged to be part of that.”