Based on my many trips to LGW from CVG and ATL...
On 767's, row 11 G/F seats can be nice if you want to sleep. There's just a closet to your left that is usually only accessed just before landing (it's where the coats go). However, I've been on flights where the cabin crew tends to forget the back section. I think this depends on the specific team working the flight. Sometimes it's an issue, sometimes not.