In reply to Rmb1:
Without knowing the specifics of the issue, I can understand why that might have deemed beyond repair, and unfortunately membranes will eventually break down with use. There's always a balance between the impact of repair vs the impact of a new jacket too, and sometimes repairs are too extensive to justify (enviro impact, cost, time etc.)
However, it's pretty unusual in my experience that some sort of resolution under the Iron Clad Guarantee isn't possible, if the item has been well looked after and hasn't simply reached the end of its life.
I tried to DM you, but wasn't able to. Drop me a message with your name and email address, and I'll happily pass it on the the Customer Service team to look into.
Mike