Process took 1 month and involved a short first stage interview / screening call with a member of the talent acquisition team. This was very relaxed but the person (who was based in Barcelona) couldn't confirm where the London office was which I thought was strange.
The second stage was with the demand planning manager and was also very relaxed and more of a conversation.
I chased for an update 10 days after this interview as I hadn't heard anything, and eventually got the decision & feedback one week after this.