Jacket is now mocked up.
I like the back. I had to redo the collar because the revers were too high before. I think I shall increase the outside edge of the collar so that it sits flatter on the shoulders, and see if I have enough material to make the sleeves a bit fuller. I'm going to use the sleeve facings as the basis for the cuffs; just need to figure out where to cut them.
I shall have to try it on, but it feels like there is too much material at the front. I may have to re-think the long dart there.