Gold CREST Awards are given to students who have demonstrated outstanding achievement in several or one large project. From the British Science Association Website:

They are longer-term projects that require around 70 hours’ work, and are typically completed by 16-19 year olds. At Gold level, your students’ work should contribute something new to the scientific or technological community or to a particular field of study.

I submitted a report on the CanSat project that fully documented the project and things we could have improved if we were required to redo the project.