Yeah, you probably won't see much either way, and with the varying flight patterns, it's hard to tell. The one time I got a kick-ass view of London was when I went over and was on a right-side window.
When we got to Heathrow, they had some delays on the ground and had to put us in this 15-minute holding pattern, circling clockwise over London. The view and coverage was perfect, and the morning was clear, so I got a bitchin' aerial tour of London and could make everything out.
I've been back XX number of times since and haven't gotten that, though. And now I always opt for aisle - it's one long ass flight