3 pin home charging

Dear all, Nice to meet you all. I am in the UK and am wondering if you can help with the following: 1) What amperage do you use (6A, 8A, 10A or 12A) when charging at home on the granny cable/portable charger? 2) How many hours does it take you to go from 20-80% on the 64kW battery? Many thanks,