Preheat oven to 160 degrees celsius. Grease a 20cm lose bottom pan, wrap the outside of the pan with some foil
Place the biscuits in a food processor and process until it resembles crumbs. You can also use a ziplock bag and a rolling pin to crumb the biscuits. Mix in the melted butter
Place the crumbs at the base of the baking pan. Press it down with the back of a measuring cup until smooth and flat. Set aside
In a large bowl mix the cream cheese until smooth. Add the castor sugar and mix until well combined
Add the eggs and combine well. Add the vanilla essence and flour and beat until just combined
Beat in the fresh cream and sour cream. Beat until combined. Do not overman. You should have a smooth, silky batter
Pour into the biscuit base, tap it down just a couple of times to release any air. Place it in a larger rectangular baking pan and pour some hot water into the pan. It should be at least half way up the cheesecake pan
Place the baking pans in the middle rack of the oven and bake for 55 minutes. The cheesecake will start to form little brown spots and will still be a little jiggly in the centre
Once baked turn off the oven, place a wooden spoon to keep the oven door slightly ajar and leave the cheesecake in for about 30 minutes
After 30 minutes remove from the oven and allow to completely cool