Join Team Brainstrust’s mission to help all people with a brain tumour at the  Run South London Half. Run South London is a brand new closed road half marathon bursting onto the scene on 14 March 2027. Whether you’re lacing up for your very first race or chasing a new personal best, this event is for everyone. Expect an incredible atmosphere, buzzing crowds, and a course designed to inspire runners of all ages and abilities. This isn’t just another race, it’s set to become one of the standout highlights of London’s running calendar. Be part of it from the beginning. The deadline for registering is 1st February 2027. Brainstrust is offering runners 50% discount on reg fees until 31st July 2026!