The Olympic torch will fly to the Channel Islands today before returning to the mainland to visit Nelson's flagship HMS Victory.
The relay will start in Southampton, Hampshire, from where it will fly from the city's airport to Guernsey.
The first of the day's 82 torchbearers will be Michael Stroud, 57, from Langley, Berkshire, who was nominated by Sir Ranulph Fiennes for his accomplishments in worldwide expeditions and his work for charity, hospital medicine and nutritional care.
An Olympics spokesman said: "Mike and Sir Ranulph's expeditions included the first unsupported walk across Antarctica, and running seven marathons on seven continents in seven days.
In a star-studded day for the Olympic Torch, the flame was carried by the captain of the Starship Enterprise and sport personalities alike.
The cast and crew of EastEnders are carrying out the final touches for tonight's Olympic Torch episode.
The Olympic Torch soared to new heights when it was taken to the top of the London Eye.