The Big Half 2026 The Big Half is a uniquely local celebration of the wonderful cultural diversity of the city of London, run through four of London's boroughs - Southwark, Lewisham, Tower Hamlets and Greenwich. Join Team LGT and take on this challenge to help us raise funds to make a difference to patients and staff at the Lewisham and Greenwich NHS Trust. All of our Big Half 2026 places have been allocated. If you are interested in joining our cheering point for the Big Half 2026 or taking part in the Big Half 2027, please email our charity team [email protected]