London Marathon organisers are considering staging next year’s event across two days.
No approval has yet been given but event organisers say they are exploring ways to enable more people to take part.
It comes after a record 1.1 million people applied in the public ballot to participate in the 2026 edition – a 36% increase on the previous year.
A London Marathon Events spokesperson said: “The London Marathon is the world’s most popular marathon, and we are continually exploring innovative ways to enable more people to take part, while delivering positive benefits for London.
“Together with our partners and stakeholders, we are looking at the intention for the 2027 London Marathon to take place across two days.
“Our immediate focus is on delivering an incredible 2026 London Marathon on Sunday, 26 April and ensuring every participant has an amazing experience.”