Pre heat oven to 325 degrees.
Coat 9-inch diameter spring form pan with nonstick vegetable oil spray.
Combine digestives and sugar in pan stir in the butter.
Press the mixture into the bottom and 1 inch up sides of pan.
Bake until light brown about 5 minutes, keep the oven at 325 degrees.
Using an electric mixer, beat cream cheese until smooth.
Gradually mix in sugar, beat in eggs 1 at a time.
Add baileys and vanilla . Sprinkle half of chocolate chips over crust.
Spoon in filling sprinkle with remaining chocolate chips.
Bake until puffed, springy in the center and golden brown.
About 1hour 20 minutes
Beat cream, sugar and coffee powder until peaks form spread mixture over
Garnish cheesecake with chocolate curls.
You may want to keep in the refrigerator.