James Cracknell has said that Prince Harry's visit to Headway a charity which helps those with brain injuries, will help raise the profile of the charity and the cause.
He said: "one of the things about brain injury is the hidden illness. If you're walking, talking, people think you're OK.
"With the profile a royal visit brings so many more people will have heard of Headway."
Cracknell won gold at the 2000 Olympics in Sydney and the 2004 Olympics in Athens. James suffered a brain injury in a near fatal accident after being struck from behind by a truck while cycling through Arizona in 2010.
More top news
Robert Gropel asked his wife while he hiked to the peak after she became ill, not realising she had altitude sickness that would prove fatal
Severe weather warnings have been issued as up to 60mm of rain is set to fall within just a few hours in some parts.
Tuesday: A cloudy, cool and dull day with outbreaks of heavy rain becoming lighter and patchier.