Now we know what Cameron's first priority will be.
The Financial Times revealed yesterday that Mr Cameron would - if he became prime minister - trim the House of Commons by more than 60 MPs. If he had announced he was cutting the number of MPs by 646 it would be a popular policy. MPs popularity is near zero so it's a soft target.
The announcement was clumsy and self-defeating because it was made with a chortle that a reduction in the total of MPs would benefit the Tories. The Financial Times reported this morning:-
"Welsh MPs reacted angrily yesterday to news that they would be the biggest losers in David Cameron's plans for a 10 per cent cut in the number of Westminster MPs.
Paul Flynn, Labour MP for Newport West, typified the tone of response by dismissing it as "a shameless piece of gerrymandering". Plaid Cymru, the Welsh nationalist party, attacked the scheme as a "gimmicky and populist move".
Perhaps I should declare a personal interest although any change would not effect me until 2015. There is no argument that Wales is over-represented in Parliament on arithmetic grounds. There are 40 MPs with an average of about 54,000 voters per seat. This is much lower than 69,000 for the rest of the country. Newport West has 62,000.
The justification is that our large number of vast rural constituencies have historically tended to have fewer voters - such as Wales' Meirionnydd Nant Conwy with 33,392. Bringing Wales into line with the rest of the country would be likely to remove 10 Welsh seats - a quarter of the total. 15 of the smallest 30 constituencies in in the UK are in Wales
Reform is inevitable eventually especially if the Assembly gets legislative powers. Cameron's announcement has put Welsh Tory candidates on the back foot. They have been challenged to say whether they are in favour of less representation for Wales at Westminster. Tricky.
There has been no stampede to respond.