EDIT - Nevermind, I looked it up.
Edit 2- Decided not to do it. Hotel is a bit pricey even with some good corp discounts. Plus, I'm OK spending ~$320 more to do a weekend getaway with my GF to Boston to make up the miles diff between this trip and doing SEA-DFW-LHR-EDI. And, no Y seat for 6+ hours!