Adventurer Sarah Outen completes 4-year London2London challenge

Sarah was joined on the Thames for the final stretch of her expedition by fellow kayakers and RNLI London lifeboats, cheered on by family, friends and supporters lining the river and Tower Bridge.

Since setting off in April 2011, Sarah has cycled, kayaked and rowed 25,000 miles.

She has survived a perilous mid-ocean rescue after being hit by a tropical storm on the Pacific, has cycled in temperatures ranging from 40 degrees in the Gobi Desert to -40 degrees during the North American winter and had a near death experience when she was sucked under the bows of a container ship in her rowing boat.

Sarah Outen said: "This expedition has pushed and challenged me to my limits and beyond.

"There have been quite a few moments when I wasn't sure if I would make it out alive. But I was determined to see this through to the end and to now be back home is really special.

"I have been humbled and inspired by the places I've been and the people I've met, which has made for an amazing few years."