Classroom Booking System

I require a php/MySQL based booking system with an admin backend. The system will be for schools so should have a day slot for an available room. This day should be broken into periods, break and lunch. The admin should be able to change how many periods are in a day and select when the break and lunch slots will be.

The admin backend to the site should allow for manual adding, editing and deleting of bookings, time slots (this case periods, per day) and a basic usage statistics.

The front end should only allow users to login and be able to edit available slots (this should be in a day view and a button or link saying available and the slot should lock after the booking form has been submitted, no approval will be necessary from an admin point of view. The admin can logon to the front end and on the locked slots be presented with a remove link that makes the slot available again.

Please ONLY post links to booking systems you have personally developed.

This is a relatively straight forward project and we will have a small budget of £50-£100 to spend maximum.