The organisers of the London Marathon are “exploring” plans to stage the event over two days in 2027, potentially allowing more than 100,000 people with the chance to take part.

The news, which was reported by The Guardian, reflects the growing popularity of running after more than a million people entered the ballot for this year’s race.

Last year’s London Marathon broke the record for the number of participants, with over 56,000 receiving a place, but ballot applications have doubled in the space of two years.

The report from The Guardian said staging the London Marathon across Saturday 24 and Sunday 25 April next year could allow around 50,000 runners on the course each day.

Increasing the number of participants would also allow more people to raise money for charity. Last year’s race set a fundraising record for the event, at £87.5m.

The plans would require approval from the mayor’s office, who said Sadiq Khan “looks forward” to working with the event and considering if a two-day event could be possible.

“The TCS 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,” a spokesperson said.

“Together with our partners and stakeholders, we are looking at the intention for the 2027 TCS London Marathon to take place across two days. No approval has been given at this stage.

“Our immediate focus is on delivering an incredible 2026 TCS London Marathon on Sunday 26 April and ensuring every participant has an amazing experience.”