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!