To drive the point home, all models wore exaggerated, frightening zombie-like makeup, which Westwood said resembled animals caught in car headlights.
Regardless of the moral message, Westwood's signature looks were all there, although the collection was relatively small: draped dresses, slim tailored coats, the cinched-in dress suit, the femme fatale jumpsuit.
At the end, Westwood came out with Cole, urging everyone present to sign a climate change postcard that they will send to U.N. Secretary-General Ban Ki-moon.
They were cheered and applauded, and some people did pick up the postcards, though others in the audience didn't take to the message so kindly. "This is getting really awkward," one told her friends as Westwood made her appeal, and bolted for the exit as soon as she could.
The grand dame of British fashion, as she is known, has been making headlines in recent years more for her activism than her runway collections. A few weeks ago, she joined forces with anti-fracking campaigners in England at a demonstration camp, and last season she used her catwalk show to campaign for WikiLeaks leader Julian Assange.
Even so, Westwood seemed to dismiss suggestions that she might give up design altogether for campaigning. Asked what she wanted to focus on in the future, she said simply: "Fashion forever."