I've seen this jacket in the flesh, at the Cabourn store which has just open, it's not a bad jacket, but expensive and a little over designed, but that what he does.
It's actually a collaboration with Alexander leathers who I believe the sheepskin is from, and constructed it.
I believe the winter collection, or next years or something is inspired by the RAF WWII so expect to see a lot more sheepskin and ventile.