The question will be put this evening as to whether MPs want to replace Trident - or more specifically - the submarines that carry the Trident.

Much of the comment in the papers today is rather predictable.  The Telegraph's leader backs the Prime Minister (Defending ourselves in an unpredictable world); The Guardian a couple of days ago urged holding back from making a decision now (Labour's looming rebellion).

However, the leader in the FT today reads like it was written by Nick Harvey - endorsing pretty much fully the line espoused by Ming Campbell and Nick Harvey in the Lib Dem's Trident debate in Harrogate a couple of weeks ago.

"Extending the lives of the current submarines would save money. Even if that proves impossible, delaying a decision on replacement until 2010 would allow it to be taken after the next review conference on the nuclear non-proliferation treaty. After that, the government may need to back a replacement nuclear deterrent. But it has failed to convince that the decision is needed now." The Financial Times - Leader

It will be interesting to see how much credit Ming and his team will be able to get for the moral victory of a close vote in tomorrow's papers.  It won't be easy.  No matter what Labour MPs think about the issue - the idea that they they might be giving Ming's team a boost will no doubt keep many with the Labour whip.

Also in today's news

• The Telegraph are watching YouTube to see how the US primary elections are playing out.