Thanks Blog Marley. I gave the DSM Store (London) a call last week but they said they had cleared all their MH stock and were waiting for S/S. Wasn't clear if they stocked Mainline or MHL, I had assumed Mainline.
I checked Fenwick, they have very little stock. They had out some AW13 jackets and coats in their Sale along with the Pea Coat from AW14. Don't get to excited Fenwick are not known for generous discounts on their menswear.