Very laid back, three interview questions (why M&S?, why would you fit the role etc) then asked for right to work and availability. Called back a few days later (after the weekend) to be offered the position.

One on one interview - did role play scenario which is basically seeing if you have the skills to identify where you can cross-sell related products to customers (e.g. looking for sunglasses, direct them to an offer on suncream). Then asked generic questions asking why you want to work for the company, how would you deal with certain situations