London mayor Sadiq Khan joins 101-year-old Dabirul in his ‘Global Walk Challenge’ Mayor of London Sadiq Khan accompanied 101-year-old Dabirul Islam Choudhury OBE in his bid to lead a global challenge named 'Walk with Dabirul' to complete 1.5 million steps. The challenge took place on April 24, aiming to raise funds for Covid-19 victims across the UK, Bangladesh and globally. At the event, Sadiq Khan remarked, "Dabirul is a true representation of London. As a Muslim, I understand how it feels fasting for 16/17 hours every day. And here we have a Londoner who is 101 years old, fasting, serving our communities in London and across the globe. I am honoured to accompany him in this historical walk and support his fundraising campaign".