Key Takeaways
- London Marathon organisers are exploring a two‑day format for April 2027, with up to 50,000 runners each day (potentially 100,000 total).
- The plan would be a one‑off trial; Hugh Brasher (head of London Marathon Events) stresses it is not intended to become a permanent change.
- Approval still pending from authorities, emergency services, Transport for London, and local boroughs; Mayor Sadiq Khan supports the idea.
- The event aims to amplify charitable fundraising (projected >£130 m) and deliver broader economic benefits (~£400 m) while responding to rising interest—especially among Gen Z women aged 18‑29.
- Concerns centre on possible dilution of the race’s unique atmosphere, increased disruption for residents and businesses, and the logistical strain of staging two mass‑participation events on consecutive days.
- If successful, the organisers pledge no further expansion beyond this single two‑day edition.
The London Marathon, first run in 1981, has grown into one of the world’s premier mass‑participation races. This year alone, over one million people applied for a place, and a record‑breaking 59,000 finishers are expected on race day. Organisers cite a surge in interest driven largely by Generation Z, particularly women aged 18‑29, whose participation has risen 105 % in the last year. They argue that, in an era marked by climate anxiety, geopolitical conflict, and rapid AI development, the marathon can serve as a powerful source of collective joy, achievement, and community‑building.
To tap into this momentum, London Marathon Events is proposing a two‑day edition for Saturday 24 and Sunday 25 April 2027. The concept hinges on staging two “mass” starts using the traditional Greenwich‑to‑Westminster route. Applicants for the 2027 ballot would automatically be entered for both days; successful entrants would be allocated to either Saturday or Sunday, but not both. Additional charity and good‑for‑age places would be offered on each day, with a target of balancing the field at roughly 50,000 runners per day—potentially doubling the usual participant total to 100,000.
The elite men’s and women’s races would be held on separate days, preserving the prestige of the top‑field competition while allowing the mass‑participation fields to spill across the weekend. Hugh Brasher notes that considerable planning has gone into making the two days feel both similar and distinct, emphasizing that the initiative would be a one‑off experiment rather than a precedent for future marathons.
Before any decision can be made, extensive consultations are required. The organising team must liaise with emergency services (police, ambulance, fire brigade), Transport for London, and the various London boroughs whose residents and businesses experience street closures and disruption on marathon day. Historically, around 800,000 people move across the capital on race day; a two‑day event would effectively double that flow, raising concerns about heightened inconvenience for local communities—particularly on Saturdays, when resident and commercial patterns differ from the usual Sunday experience.
Financially, the projected impact is substantial. Brasher estimates that the two‑day format could generate more than £130 million in charitable fundraising, more than double the amount raised in recent editions. Independent research from Sheffield Hallam University suggests a wider economic uplift of approximately £400 million for London, driven by increased spending on accommodation, hospitality, retail, and transport. Socially, the organisers highlight the well‑documented physical and mental health benefits of running, as well as the sense of community fostered by running clubs—a valuable antidote to the isolating effects of online life.
Nevertheless, the proposal is not without skeptics. Andrew Smith, former London Marathon race director and now CEO of the Manchester Marathon organisers, warns that spreading the iconic crowd atmosphere across two days could dilute the magic that has made the London Marathon’s spectator support legendary. He questions whether participants would experience a diminished sense of occasion if the famed roar of the crowd were split between two mornings. Smith also worries that an even larger London Marathon might overshadow smaller northern events, diverting attention and resources away from other races.
Brasher counters these worries with a pizza analogy: rather than fighting over the size of a single slice, the goal is to enlarge the pie so everyone can enjoy a satisfying portion. He reiterates that the two‑day race would be a singular, explored opportunity, and if proved successful, the organisation would resist any temptation to repeat or expand the format further. As discussions continue with stakeholders, the fate of the 2027 two‑day London Marathon remains pending, balanced between the promise of unprecedented participation and fundraising against the imperative to preserve the event’s beloved character and local goodwill.