Some interesting information here about potential coalition combinations: Coalitions
My view is that we are going to need another election sooner rather than later to see if the electorate can make their collective minds up. A rainbow coalition would be very unstable, but there could be tensions in a Conservative-Liberal arrangement which could increase over time. However, the Lib Dems have a clear interest in avoiding an early election.
This article on the splut between metropolitan Britain and the rest of the country in the context of globalisation is worth reading: Globalisation