I worked at Primark part-time (More than a year)
I personally loved working at Primark. Met and work with some amazing people! If you work on weekends you'll work with a lot of people who are young and are at uni so can always plan nights out as a group. Week days tend to be more mature people who work and are really bubbly. Often given the choice of overtime which is great especially if you want to earn extra cash. Many sales assistants can progress to supervisors which is great to have on your CV especially if you are still at uni.
I do think the company culture needs to change as many staff have a cant be arsed and rude attitude which is often visible by customers; often making me feel ashamed to work at Primark.
I applied online. The process took 2 weeks. I interviewed at Primark (Milton Keynes, England).
After submitting my CV online, they just called to tell me I have an interview with them. Also, it alright if you don't have any experiences, because i didn't beside my work experience the school made us do.
The interview was like a quiz, sort of, the interviewer had a sheet of paper with questions and i'd just answer them and he'd write what I'll say, The questions would definitely link to the job you were applying for. For example, applying for the role of Sales Assistant: what would be the top priority from the 3 - customer service, picking up and another one but I forgot. Also, it'll be beneficial if you do a background check on Primark - history, name, what they sell, facts, etc.
Tip, bring essential documents (passports, national insurance etc.), even if you think they're unnecessary.