Election must reads: Evening edition

Gordon Brown prepares for hung parliament - Jon Craig on Sky
Labour’s answer to the Lib Dem dilemma – Polly Toynbee in The Guardian
Did the move to Lib Dems predate TV debate? - Mike Smithson
Message to parties: Your slogans aren’t working – Ben Macintyre in The Times
Politics in uncharted waters – Steve Richards in The Independent
Sour Brown memories threatening Lib-Lab deal – Nick Robinson’s newslog