oooh yeah, London is daunting at first, especially when you've got no job or house to live in. obviously I'm a sucker for this cos I just went thru it all again when I moved to Sydney in Jan!!
both times I've started applying for a "million" jobs every day as soon as I arrived & started looking for somewhere to live a couple of days after arrival. People kept telling me just to go hard out looking for work and that it will get easier even if you don't think it will. All of a sudden you will have been there for a few months working and suddenly have the brainwave that things are going alright! and then you start wondering where the time has gone!
If your flattie thinks it might be hard to get a job in her line of work she should be looking for any kind of work right now. on the plus side at least she's got a nice flattie to live with!