I applied through a staffing agency. The process took 1 day. I interviewed at Burton's Biscuit Company (Edinburgh, Scotland) in Oct 2014
Interview
You need to fill in a form about name, phone number, work hours. I handed it in to the recruiter officer. Next day they call me for an interview. She explained to nature of work we will be doing and some safety points. They we were given paper to answer some questions related to legibility for work and other simple qs about safety and literacy.