As Chris says: "the majority of these people live in safe Labour constituencies, their vote not courted by direct mail shots from Lynton Crosby or Labour HQ. ... Any party that prizes fairness to all citizens must put fair voting at the heart fo its programme, because economic and social fairness follows from political power".
One other story of note, this time in today's FT: more on Patricia Hewitt's sensible and broadly supportive stance on electoral reform compared to that of Lord Falconer. The meat of the piece is easiest just to quote direct:

Patricia Hewitt, the health secretary, has called for a "much fuller debate" on voting reform. The government has promised to consider the issue, amid increasing concern at the disparity under the current first-past-the-post system between the share of the vote won by parties and their total number of MPs. Ms Hewitt said yesterday she had "always been in favour of electoral reform, but I'm not naïve about it". She told the GMTV Sundayprogramme: "There certainly isn't a consensus at the moment in parliament or in the government or indeed, I suspect, across the country about what the best voting system would be."