"Equal constituencies" sound fair.
"If the question is 'should the constituencies be of equal numbers?' then we are in favour of the principle of more equal constituencies," he said.
The country has a Westminster-style system: it is divided into 543 roughly equal constituencies (typically with some 1.5m voters), each sending a single MP to parliament.
Chartists campaigned for universal manhood suffrage, a secret ballot, equal constituencies, annual parliaments, payment for MPs and the abolition of property qualifications for MPs.
In a further twist of the screw, the coalition's second great change in the electoral system – the combination of more equal parliamentary constituencies with more frequent boundary changes – will almost certainly harm the Liberal Democrats and, for that matter, all small parties and independents.
"The PM remains of the view that we should have fewer MPs to cut the cost of politics, and more equal size constituencies so that people's votes have more equal weight," he said.
Speaking on Monday, a No 10 spokesman said the prime minister "remains of the view that we should have fewer MPs to cut the cost of politics, and more equal size constituencies so that people's votes have more equal weight".
The coalition agreement talks about "the creation of fewer and more equal-sized constituencies".
A referendum bill on electoral reform includes provision for the introduction of the alternative vote system, as well as the creation of fewer and more equal-sized constituencies, and fixed-term five-year parliaments.
Set the mindnumbing task of creating 500 almost equal-sized constituencies in England (plus two uniquely small ones for the Isle of Wight which do count as legislative discrimination) the Boundary Commission for England has gone about the job in a fair and independent way.
