- crush the  biscuits and mix with the melted butter until well combined 
- Press the mixture firmly into the base of a springform pan (about 8 inches/20 cm) 
- Chill in the fridge for at least 30 minutes  
- Beat the cream cheese, icing sugar, vanilla extract, until smooth 
- In a separate bowl, whip the double cream until soft peaks form 
- Gently fold the whipped cream into the cream cheese mixture until well combined 
- Spread the filling evenly over the chilled base and smooth 
- Cover and refrigerate for as long as possible!