In reference to what could be shipped, my mover had a guideline. In reference to edible foods, it had to be in original packaging and unopened, except for spices. Anything else, as long as it wasn't opened- that was more for your benefit than anything, given the length of international shipments.
I'm getting ready to do this all over again. Garage sale, here we come! On the upside, hubby reminded me I was going to be in heaven when we returned because I was going to get to go shopping for LOTS of things! And funny enough, we'll be stocking up on lots of English goods to be moved