I think I've got just about everything ordered now (short of the veg that I'll get at the market) but there are three things I miss from traditional American holiday meals and can't get here:

Candied yams. These are really just sugary sweet potatoes, not actual yams. When I was growing up, they were always made from the canned vegetable but they taste nearly the same from fresh and are easy to find in the UK.

American style stuffing. This one's more difficult because English stuffing uses very fine ground breadcrumbs while American stuffing uses dried bread cubes. My favourite is made with the pre-seasoned cubes, but I can approximate it by drying some white bread and cutting it into cubes. Wish I could get the spices right...

Eggnog. It's been years (and years) since I last had eggnog and I've had a craving for months now. Hard to describe (it's an eggy nog - ok, maybe not so hard). I guess I'm going to have to make it myself.