Thank you for posting, sorry to hear she had to go through this though.
Maybe it's a very good reason to always chat to someone by phone even, before committing to a relationship, though perhaps if you aren't used to UK accents, you'd not recognise one?
It's always bloody Nigeria or africa isn't it
For all it's worth, it's extremely unlikely anyone from the UK would request you sent them money if you are in a relationship -it's just not, well this might sound old fashioned, but for a start, it just isn't the "done thing".
Edit, just thinking, even moreso if he was working for British Petroleum or otherwise contracted to work abroad, well I know enough people who do this, and they are all of them on very good money. There is no way he would be unable to get $400 because of being stranded at an airport. That's ludicrous, he'd have a bank card, or if he didn't - then he would have plenty of spare cash on him. If he was carrying neither - then run because you'd be dating a real fool!
Also everyone has bank accounts, and most likely credit cards, and if push came to shove in an emergency, our banks will usually sort something out.
It just gets me well angry this sort of thing, even the moreso as it's picking on a woman from a place where $400 means more than say to someone from my country