Alan Johnson is neither Ed Balls nor married to him

It is hard to escape the conclusion that Alan Johnson has been made shadow chancellor because:

1. he is not Ed Balls;
2. he is not married to Ed Balls.

Still, Ed Miliband's decision to appoint does suggest that he is planning a strategy that goes beyond opposing every Coaltion spending cut. That will help the quality of political debate in Britain and will not do Labour's prospects any harm in the long run.

You can debate whether this shows Ed Miliband is strong - prepared not to give Balls and Cooper what they wants - or weak - unable to trust himself to control economic policy if he gives one of them the post to which they are most suited. I tend to the theory that it means he is weak. I am reminded of the way the England selectors used to leave out good players (John Snow, Phil Edmonds) because they might be disruptive or hard to control.

But today's events do show how odd the Labour party's internal organisation is. You have a leader who was not the preferred choice of most Labour MPs (or most Labour members, come to that) obliged to put together his Shadow cabinet from the names those MPs have come up with. More than that, he is more or less obliged to give senior positions to people who come high in the poll

So Labour ends up with Alan Johnson, a shadow chancellor who knows nothing about economics; Yvette Cooper, a shadow foreign secretary with little experience of foreign affairs; and Ed Balls, who has hitherto shown no interest in home affairs - he promises to be like Charles Clarke but without the charm.

Incidentally, once Ed Miliband had made up his mind to appoint a shadow chancellor who was not Ed Balls or married to him, John Healey might have been a better choice than Alan Johnson. Healey has a little of Vince Cable's lugubrious charm about him.