They wanted one a while ago. Now they may well have one, with the nationalisation of Northern Rock.
But this Clause 4 is the other kind of "moment". The death knell for any claims they may have of economic competence. A Clause 4 in reverse.
They are in fact now changing the Clause 4 back to the old one, in practice if not in words.
From the meaningless:
The Labour Party is a democratic socialist party. It believes that by the strength of our common endeavour we achieve more than we achieve alone, so as to create for each of us the means to realise our true potential and for all of us a community in which power, wealth and opportunity are in the hands of the many, not the few. Where the rights we enjoy reflect the duties we owe. And where we live together, freely, in a spirit of solidarity, tolerance and respect.
Back to the unworkable:
To secure for the workers by hand or by brain the full fruits of their industry and the most equitable distribution thereof that may be possible upon the basis of the common ownership of the means of production, distribution and exchange, and the best obtainable system of popular administration and control of each industry or service.