You obviously have an urgent problem
The only way to solve it is to get in touch with the Passport Service
This page will give you some details about urgent applications
http://www.ukpa.gov.uk/_3_urgent/3_contents.asp
They won't do it, no exceptions. If you've lost a passport then it'll take a week for all the security checks for a replacement. They can't cut the time down, you're out of luck.
I'm not sure if it's changed but I got a passport in 5 hours once, you have to be at the passport office when they open, you have to be traveling within the next 24 hours and have all the Documents with you, including travel doc's (i.e. plane tickets). Hope this is of help