In theory nothing as these were local elections but it is an indication that the coutry is not happy with the government and Brown in particular.
I think that the Labour Party will replace him sooner than later so it looks as if we are set for a thrid Prime Minister in less than a year. This time though I wonder if they will go to the country I have my doubts as at present I do not think the Labour Party would be re-elected even if people are not that keen on Cameron I think he and his party would be preferred over the current bunch.