Thanks for all the info everyone
I have a couple more questions...
When I log in to select seats it seems the first 8 or so rows of economy are 'unavailable', are these seats legitimatly taken or just unavailable at this point? If I pay to seat select now, can I change it around later if a better seat comes up? It looks like the best seat I can get now is 53D. I'm keen for an aisle in the middle section, because I'm a light sleeper and hate people crawling over me but I also hate the idea of being stuck in next to a window for 14+ hours.
Is there I way I can search how busy this flight is historically? As a solo traveller for the first time I'm excited to try and get a row to myself. Any times for swaying the odds in my favour on this one?
Under Meal Service it says "Lunch, Refreshments". Previous times I've flown trans pacific it has been two full meals and snacks, is it really only one meal over 14 hours of flying?
Finally I'm booked onto a codeshare flight with AA (AA136) from LAX-LHR, in my itinerary the inflight services actually say "Lie-flat Seat", this is just incorrect right? It definitely says Economy in the class of service and I got the flights dead cheap.
Thanks for all your help guys!! I love flying and one day hope to make it into Premium or Business but as I'm a nurse with no opportunity for work travel I'll just have to do with making the most of my Economy experience.