JP Morgan looks to have emerged as the big winner from Trainline.com's derailed London listing, acting as sole adviser on the subsequent sale of the business to KKR just weeks after it announced its intention to float.

KKR confirmed its agreement to acquire Trainline.com from Exponent Private Equity for an undisclosed sum in a statement this morning. The decision to sell outright comes shortly after Exponent announced it would look to IPO the business on the London Stock Exchange.