Raileasy seem to be planning a split ticket engine. Described as "coming soon" on their site here:
http://www.raileasy.co.uk/home/split-tickets
http://www.raileasy.co.uk/home/split-tickets
Split Tickets
***COMING SOON**
Why book split tickets?
If you want the cheapest train ticket for your journey but can't commit to travelling at a certain time or date or you've left it till the last minute and there are just no more cheap rail fares for your journey, split tickets are the answer to your problem! Even if you're booking on the day of travel, split tickets can save you a small fortune on the usual cost of rail tickets.
What is a split ticket?
- A split ticket is simply where instead of having one train ticket to take you from your departure point to your destination the journey is broken down into two or more parts with a separate ticket for each section.
- For instance if you want to travel from London to Manchester you might get a train ticket from London to Stoke-on-Trent and a second rail ticket from Stoke-on-Trent to Manchester.
- Britain's illogical rail fare system means that splitting your ticket by booking a train ticket to an intermediary station and then a different ticket from there to your destination often works out far cheaper than the cost of a conventional train ticket.