Empty the tin of caramel into a mixing bowl, and add 45ml's of the whipping cream to it. Beat with an electric mixer until smooth & creamy.
Empty the remaining whipping cream into a separate mixing bowl, add the sugar and beat until the cream becomes stiff. A good tip is to always ensure that your cream is cold before you beat it. If it isn't, it won't stiffen up nicely and could result in you overmixing it and making butter!
Prep your bananas by thinly slicing them, and set aside.
Using a spatula, place a thin layer of the whipped cream in the bottom of your dish to coat it.
Place the Tennis Biscuits, face down into your dish until the base is covered.
Spread a generous layer of caramel on top of the layer of biscuits (1/2 the amount of caramel).
Place a layer of sliced banana on top of the caramel layer.
Repeat: cream, biscuits, caramel and banana layers, reserving half the cream for the top layer.
To finish it off, spread a layer of cream and sprinkle with finely crushed Tennis Biscuits.
Pop it into the fridge and leave it to set for a good couple of hours/over night. This gives the Tennis Biscuits a good chance to become soft, and the tart will melt in your mouth... enjoy!