1. To make the chocolate sauce, break the chocolate into small pieces and place in a heat proof bowl with the syrup and butter.
2. Heat over a pan of hot water until melted, stirring until well combined.
3. Slice the bananas and whip the cream until just holding its shape.
4. Place a scoop of ice cream in the bottom of 4 tall sundae dishes.
5. Top with some slices of banana, some chocolate sauce, a spoonful of cream and a good sprinkle of nuts.
6. Repeat the layers, finishing with a good dollop of cream, sprinkled with nuts and a little grated or flaked chocolate.
7. Serve with fan wafer biscuits (cookies).

Variation:
For a traditional banana split, halve the bananas lengthwise and place on a plate with 2 scoops of ice cream between.
Top with cream and sprinkle with nuts.
Serve with the glossy chocolate sauce poured over the top.