London Marathon organisers believe two-day event could bring £400m economic boost

• Event director says £130m could be raised for good causes

• ‘You can lose the love, and we have to be mindful of that’

London Marathon organisers have revealed more details about plans to stage a two-day event next year which they say would be an “incredible celebration” that would raise more than £130m for charity and bring in £400m in social and economic benefits.

As the Guardian revealed last month, advanced talks are under way for the one-off event which would allow around 100,000 people to take part, nearly double the number running on Sunday.