I believe there are delays all around the country because of the increased numbers making claims.
If you have no income in the meantime, you can contact the local Community Welfare Officer, based at your local health centre and apply for Supplementary Welfare Allowance (SWA) which may be paid while you're waiting on your Jobseeker's claim to be processed.
SWA is means-tested (unlike Jobseeker's Benefit), so if there is other household income you might not qualify. If you do qualify for SWA, it will be repaid from your Jobseeker's Benefit arrears when that claim is sorted out.