Insurance calculator - PHP / MySQL

We require someone to work in our west london based office for 4 weeks starting Wednesday 18th January. The project is to rewrite a PHP based Insurance calculation website, to some specific client requirements. You will need to demonstrate good PHP experience, good Mysql experience, be experienced in session based user level security, and have experience of some complex algorithm design and testing. You must be client facing when necessary. There will be very little HTML to be done in this project, as this will be provided for you. You will be capable of reusing code predeveloped by other people, but willing to innovate where necessary.