Wow I'm sorry to hear about the loss of 4 more jobs.
1. Is the debt solely the overdraft?
2. AFAIK having given a personal guarantee on the overdraft, it's effectively a personal loan anyway?
For this reason, when my bank asked for personal guarantees for overdrafts and credit cards, I decided I could get by without them.
Look at the applicable rates of interest and get independent advice about what best to do.
3. Look at the T&Cs for the leased vehicles for info about breaking the lease. You can't sell them because they're not yours (and neither can the liquiditor, right?) - they still belong to the leasing company.