I applied online. The process took 2 weeks. I interviewed at Lidl (Southampton, England) in Jan 2019
Interview
Send your application and they get in touch telling whether you advance further or not. If successful at this stage, you are required to complete an online video interview by some deadline they specify. The video interview takes at most 15 to 20 minutes, but you can prepare for it if you wish, by expressing what you value about Lidl and the retail industry.