Four-time London champion Eliud Kipchoge and Olympic champions Sifan Hassan and Tamirat Tola among the favorites in Sunday's London Marathon.

Sifan Hassan concedes she remembers little about her remarkable marathon debut two years ago in London when she stopped twice to stretch her hip before her stunning kick down the home stretch to victory,

Thousands of novice runners will be participating alongside some of the finest long-distance athletes on the planet as PBs are broken, records are targeted and millions are raised for charity on what is often one of the most feel-good days of the sporting calendar.