We are about to move to Camden, partly with an eye on admission to secondary school. I gather I will need to prove we were living there a year ahead of the application date—which we will be if all goes OK. What proof will I need to supply when I apply (in 2022 for 2023 entry)? I should have relevant bills and so on but was, for instance, hoping to keep the same dentist in our old area. Will that look suspicious?