For those of you who are interested to find out what has happened to me since quitting without another job.
I am happy to say, as it has worked out quite well, that with 3 days to go before my last day at work I was asked if I wanted to be transferred to our New York office (I live in London) to take on a new role. I did not have another job lined up and was staring down the barrel of unemployment until yesterday and now I am moving to New York City!!!, or possibly Jersey

It is hard to say whether the fact that I quit had anything to do with it but it has certainly worked out well. Sorry to boast