pebbledash,
If you have no income while waiting on your jobseeker's you may be entitled to Supplementary Welfare Allowance. You can make an application with your Community Welfare Officer at the local health centre.
SWA is a means-tested payment, so all household income (e.g. spouse/partner working, pension, etc), savings or property (except family home) will be taken into account.
If you qualify, payment will continue until your Jobseeker's claim is decided.