After you've completed their online process they contact you within a few days to set up a telephone interview. During that interview, which was in my case 3 days after their call, you are asked to provide them with some details about yourself (authorisation process) and then you're asked about Sky itself, their offer, customer service, your experience, why you'd be good at this job and etc. Immediately after the conversation you're informed whether you passed it. If yes, they tell you that you are invited for a Sky Experience Day, which is basically talking to other candidates there, discussing things like good customer service, group work, role-play (sales advisor-client) and a few written tasks. After that they contact you within a few days to tell you if you're employed or not. Everyone is extremely nice and helpful, nothing to worry about :)