John and Doris with their £500k house in Bedfordshire aren't the top 1%. They probably think they are, and the real top 1% are quite happy to let them think they are, but they aren't.
Labour need to be doing work to get to the real facts and to convince people. Who are the real top 1%, and how will they be taxed more? Don't worry John and Doris, its not you. That's the work Labour should be doing, but they aren't.
Here's a nice little calc to play with which grades your income, savings, property wealth and spending.
https://www.ons.gov.uk/visualisations/dvc1802/calculator/index.html
Im in the top 20% for income but the bottom 30% for property wealth and savings. If I put a pensioner in with a £500k house but basic state pension, they come out bottom 10% for income but top 10% for property wealth, so they wouldn't be top 1%, or anywhere near, overall.
Unfortunately the calc doesn't give you an overall combined result.