"Pardon me? The argument (not drafted by me, even)"
<no, but reproduced on your website>
"is that we have to form an alternative to New Labour and Gordon Brown, in time for the next elections."
Well, it is a bit ambiguous, actually, as in this phrase:
"The mass of Labour voters simply did not vote. We cannot afford a repeat of that."
Which reads like a call to get the Labour vote out, not turn them into a left-of-Labour vote.