Earlier quoted context omitted.
I'm talking more about Ilford, Barking, Wembley, etc...
Sorry but those are definitely not what counts as nice areas in London. I also doubt you would find something for £600 in some of those areas today.
http://www.rightmove.co.uk/property-to-rent/map.html?locatio...
Also note a lot of these would be likely £600+ since this doesn't show additional fees (estate agent, taxes etc.)
Now, this may seem like an abundance of results – but a number of these listings are actually house shares, parking lots, garages etc. Maybe you'd be ok with sharing a house (I wouldn't) but I'm sure we can all agree living in parking space is out of the question.
So maybe it's doable, but I think it'd be really hard work trying to find a place that's not kept together with shoe string and duct tape, while being in a decent area with a decent commute.