Yes, Cadbury chocolate is a good option for melting. While Cadbury is not as popular here in the US compared to the UK it is a great option. When heated up, it has a fantastic consistency.
It is rich, thick and creamy, which makes it a fantastic option for melting. To melt Cadbury chocolate, avoid melting it in the microwave where possible, and this can cause the chocolate to become overcooked.
Instead, you will want to place the Cadbury chocolate into a glass bowl and heat the chocolate slowly over a pan of water that has been left to simmer. This allows the chocolate to melt slowly and will create the best and smoothest consistency.