I applied for a luxury brand that is hiring for summer full time position on the harrods website.
The process differs for different brands but this I believe is the generic interview process for most brands.
There is a phone interview in which they will tell you whether they will take you through to the interview process at HQ - they will also confirm whether you were successful and the next steps to take via email.
Experience is always a pro since I was asked to bring a passport and CV (showcase your uniqueness and skills on your CV! it is the best opportunity to make you stand out in a group interview) and focus on appearance- do not take the uniform policy lightly, however, the urban myth that you must look like a model is not true, as a female makeup is a must in Harrods, However, I'm short and definitely not the typical attractive model like sales associate you see in high end stores, in fact experience and what skills you can offer thrives in a competitive interview such as this!
I also arrived 20 minutes LATE! but I had a valid reason! so I did not face a group interview as initially intended since I was seen an HOUR later- but I believe this helped me since it ended up being a 1-1 interview.