I send a CV and cover letter, then I was invited for an interview. After the interview I had to do a maths based aptitude test. The interview was with a panel of 3.

A 30 min competence based interview with a panel of 3 people. I was asked to describe my employment history and then asked questions about why I wanted the job and how I thought my previous experience was relevant. After the interview there was a brief numeracy based aptitude test.