London leeds day return train ticket?

It depends on when you intend to travel. In the immediate future you would have to pay �74.80 for a saver return (increasing to �79.20 in the New Year) If, however, you do not intend to travel for about a month you could do it much cheaper by buying 2 singles For example, on the 17th January there are singles to London on the 10.40 (arr 13.10) for �11.25 and a single for your return on the 18.33 and 19.30 for �28.50. These must be booked in advance however.