Moves are underway to teach students the basic meaning of contract. Understandable disquiet at the rise in tuition fees has of late been cast as an example of broken promises by the LibsDems. Whilst the party did indeed oppose a rise in tuition fees before the election, this was based on an understanding that it could or would be the sole party of government. Since the LibDems did not become the sole party of government - and students supporting them did not expect them to be either - then their current support for the rise in tuition fees does not constitute a broken promise.
Or, put in the simple language so beloved by academics and Sir Humphreys alike: Opposition to a rise in tuition fees was predicated upon the eventuality of the LibDems becoming the sole party of government. The subsequent formation of a coalition with the Conservatives superseded the guarantees extended prior to the election. etc etc
(More on this as it breaks...)