I'm quite confused over the dates to apply for my extension. My BRP dates are: 18/5/2018-1/3/2021 and my Visa vignette is: 1/6/2018-1/7/2018. Am I correct in calculating that I should apply on 3/11/2020? :| Also, I read on here that someone put in a Home Office reference number from their first Visa ...