Haile Gebrselassie to be world record pacesetter at London Marathon

• Ethiopian will take field to 30km mark at record speed• Mo Farah will make his marathon debut in London Haile Gebrselassie will pace a world record attempt at April's London Marathon, race organisers have announced. The Ethiopian great, 40, has been enlisted to take a loaded men's elite field, including debutant Mo Farah, to the 30 kilometres mark at world-record speed on 13 April. Kenya's Wilson Kipsang, who will be perhaps Farah's biggest threat, set the current all-time mark of two hour...