Karl Bushby, a man who embarked on an extraordinary circumnavigation of the globe on foot in 1998, is nearing the culmination of his nearly three-decade-long journey. Leaving his home in Hull, England, on October 1, 1998, with the intention of walking 30,000 miles without using any form of transport and without returning to the UK, Bushby is now just weeks away from completing his mission.

At 29 years old when he began, Bushby set out with a clear purpose: to avoid a future filled with regret. He departed with a specially adapted trolley, nicknamed 'The Beast', filled with essentials, pushing it at a steady pace towards Heathrow Airport. His journey commenced in the southernmost tip of Chile, leading him through Patagonia, the Andes, the West Coast of the United States, and along the Alaskan highway. He then crossed the Bering Strait into Russia, continuing through Mongolia, China, Kazakhstan, and along the Silk Road, eventually making his way across Europe.

What was initially projected to take 12 years has been significantly extended due to unforeseen circumstances. The 2008 financial crisis, a global pandemic, and visa issues each caused delays of approximately three years. Bushby, now 57, acknowledges that flexibility has been crucial, allowing him to navigate challenges such as a 3,000-mile diversion to the Russian embassy in Washington D.C. to secure a visa. These delays have extended his journey by 16 years beyond his initial estimate.

Bushby's trek has been marked by a series of extreme challenges and remarkable feats. He has faced imprisonment, robbery, severe weather conditions, and treacherous terrain, including encounters with polar bears. In 2000, he navigated the Darien Gap, a dense jungle region between Panama and Colombia, then in civil war, surviving on fish and coconuts for weeks. He has also completed an 186-mile swim across the Caspian Sea, undertaken in stages over a month, and crossed the 53-mile Bering Strait, an ice floe between Alaska and Russia, in freezing waters in dry suits. He described the latter as the harshest environment humans can endure.

As he approaches the UK, Bushby expressed anxieties about his future. "I'm terrified. Very, very uncomfortable," he stated, revealing his concern about returning with no savings, no pension, and no clear plan after dedicating nearly 30 years of his life to this singular purpose. He currently finds himself in Belgium, approximately 500 miles from his hometown of Hull, with about a month's journey remaining.

The final leg of his journey presents a unique challenge: crossing the English Channel. Initially, he had planned to walk through the Eurotunnel, but this was not permitted. He has now secured special permission to swim the 21-mile stretch, a prospect he is not entirely enthusiastic about, especially given the lack of time for dedicated training. He will undertake the swim in stages with fellow long-distance walker Angela Maxwell.

The expedition originated from a pub bet and a desire to prove himself. A former paratrooper, Bushby's journey has been a testament to his physical and mental fortitude. He has set records by accomplishing feats previously thought impossible, such as the full crossing of the Bering Strait without transport. He also completed the Caspian Sea swim, a feat no one had attempted before.

Karl Bushby in Montenau, Belgium with the Daily Mail's Jane Fryer

Bushby's experiences include near-fatal incidents, such as slicing an artery in his wrist and stitching it himself in Peru, and collapsing from exhaustion in the Arctic. He attributes his ability to persevere to a strong mindset and unwavering determination, qualities he also displayed when he attempted to join the Parachute Regiment five times as a teenager. Despite a slight build, dyslexia, and a love for bird-watching, he eventually succeeded.

He recalls enduring extreme heat, particularly on the California-Arizona border where temperatures reached 50 degrees Celsius, and finds the cold of the Arctic more challenging, describing it as a constant threat. Beyond the physical endurance, Bushby has also demonstrated resilience in his continuous pursuit of sponsors and funding. His 'Goliath Expedition' has been supported by a small team of fellow adventurers, and plans for a documentary are in development.

While the extended timeline has been frustrating, Bushby maintained confidence that things would improve, viewing his journey as his life and his purpose. He describes the daily routine as often mundane, akin to a job, involving walking in various weather conditions. He admits that his body has shown signs of wear, with lost toenails, a softening physique, and knee issues, reinforcing his view that "It's definitely time to get this done now."

The personal cost of his mission has also been significant. Bushby has experienced two serious relationships that faltered due to the pressures of his journey, including visa issues and the pandemic. He has also been estranged from his son, Adam, who was seven when Bushby left and now has an 11-year-old daughter he has never met. He has seen his immediate family only a few times over the past 28 years.

Despite the hardships and personal sacrifices, Bushby remains resolute in his commitment. "No," he firmly stated when asked if he would ever bend his rules, even in the event of a family emergency. His mother, Angela, understood this commitment, telling him not to return if anything happened to her, though she admitted she did not expect the journey to take so long. She plans to be waiting at the garden gate when he finally arrives home.

Karl sat in the middle of the road in Nevada, USA, in 2003 during his 28 year round the world walk

Looking ahead, Bushby has a documentary scheduled for release later this year and has established a non-profit organization to promote STEM subjects in schools. However, his primary desire is to share the lessons learned during his travels, emphasizing the kindness of people and the wonders of the world. He believes that despite the 24-hour news cycle, which can foster fear, his experiences have reinforced his hope in humanity.

Reflecting on his nearly three-decade-long endeavor, Bushby expressed no regrets. "I wouldn't change a thing. Not a single thing. I'm nearly home. It worked," he stated, marking the impending completion of an unparalleled journey.