Instinctively, I absolutely agree on the not wanting to pair up with anything fashion related. The fashion industry many of it's wasteful practices and cultures are pretty bad.
Don't agree at all on the dig at activists though. Mainy because every time I've come across that sort of arguemnt it has never meant to be constructive but instead to simply discredit and marginalise. I find it a hard stance to find any respect for, but that's just me.
The partnership with the fashion group in question will live or die on how serious they're taking the climate side of things. If it turns out they're just milking some eco-kudos without changing a thing about their practices they can get lost. I'd hope Agag was shrewd enough to put something into the contracts to stop that happening. However, if they show through this partnership what they are doing to reduce their impact or, better still, it somehow 'inspires' them to do more then I can see myself being ok with it.
(thanks to their Extreme E supply partnership, I've already found out about Continental's research into rubber derived from Russian dandilion roots to reduce reliance on tropical environments and oil supply).