There were five categories to choose from, each with a different brief, so I read them all before deciding on two that I thought I had ideas for: Construction and Pharmaceuticals. After deciding that I would be better going for the Construction brief, I wrote the 1,000 word essay, including graphs and some rough calculations and submitted it online.
Some weeks later I received a phone call to say that my essay had been chosen to go through to the final. I then had to submit another essay, developing my idea further, by mid-May. In early June I was invited down to London, staying in a fancy hotel in Kensington, and asked to present for 20 minutes in front of senior staff/the CEO from Babcock International.