absolutely. you should look for work on jobserve. i assume you look for php work? it pays less than js, which pays less than java, but a quick look at php contracts in london shows them between £300pd to £450pd - so as above, £40k for 6m
As for the jobs advertised on sites like jobserve. Most of these require you to work on site as a contractor which right now isn't something I want to do. Freelancing for me is a lifestyle choice, not necessarily a financial one.
Again this might change in a few years, I'm getting older and want to start a family, and so this lifestyle might not work for me then.
I just hope that my time spent freelancing is seen as a positive on my CV in future, if indeed I do need to make that jump back into full time employment.
It's an interesting, in fact it's a fascinating way of working.