They give one interview to the staff and then you are taken to the laboratory. I was then offered the job and told to see the way the laboratory works. They wanted me to stay there the whole shift but because of a problem in the laboratory I never stayed. But I was given a chance to make a colliert tray with 100ml of water mixed in powder. Which is a main part of the water laboratory work. I spoke to others afterwards and they said they were taken to the food laboratory and asked to cut a fruit sample to a certain weight and test it. Interviewed by two people, the main manager and the team leader. While waiting for the interview sat with others waiting for interview. Interviews tend to recruit several people not just one. There is a unused building across the road where you can park, the road outside the building is normally full of cars. And surrounding roads need a permit otherwise park near willesden junction station and walk down.