Sir Ranulph Fiennes will receive a royal send off from Prince Charles today, when his icebreaker departs London for Antarctica.
The ship will set sail from London Bridge on a six month trip, conducting research and raising money for charity.
You can follow the journey on the website here
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London and the worlds has united on Twitter in defiance of the attacks #prayforlondon #wearenotafraid
London was today a city of sirens and half mast flags in the wake of another terror attack.
MPs said they would "carry on" and go to work "as usual" in defiance of the terrorist attack outside the Palace of Westminster.