Hoping you BA experts can help. Flying the 77x version of the 777-200 with 17 F seats from LHR to EWR next week. Wife and son are in 2F and 2K. The only other window seat available for me is 4K. Seat guru does not show this configuration. Is 4K, with no 5K seat behind it, too close to the back lavatories or galleys to cause a problem? Any other reasons not to choose this seat? Thanks.