So, about a month ago I was having some serious relationship issues and considering a move back to the USA. It was a scary situation because I don't have the funds to buy plane tickets, but I was quite relieved when I found out about this service offered by the US Embassy.
Though everything is looking up for me here and I am glad that I stayed, I thought that I should share this information for anyone who may find themselves in such a quandary.
The US Embassy will give a "repatriation loan" to people who find themselves stranded in the UK. The loan will pay for a plane ticket to the US city of your choosing that is bought through American Express Travel (that is the only vendor they will use), but it has some stipulations. First you must supply them with the telephone numbers of at least three family members or friends who they will contact to make sure that those people are not able to lend you the funds. Then you will have to go to the embassy in London to cancel your passport and be issued an emergency passport.
They will fly you out as early as the next day after your appointment, and they will reissue a regular passport to you as soon as you have repayed the loan.
It isn't an ideal situation, but for those who are desperate, this may be a viable option and I wanted to make sure people were aware of it.
Also, sorry if this has been posted before or if I posted it in the wrong area!http://www.usembassy.org.uk/americanservices/?cat=17