I don't know where you stand regarding unemployment benefit [Jobseekers Allowance] but you might find you don't qualify for it to start with because you have resigned without a job to go to. Also, if you haven't given notice, you can forfeit any monies due to you by your employer.

http://www.tuc.org.uk/extras/jsasanctions.pdf

I strongly suggest you have a browse of the ACAS site and see what your rights as an employee are.