You know how to live buddy! Enjoy 😊 

I was curious about the cake, so I googled it. Except for many of its traditional forms, I have also found his one and I'm sharing it as you're British  :

click here to see examples

One of them, for instance:

BTW:

Quote

Battenbergwas created by British Royal household chefs to celebrate the marriage of Prince Louis of Battenberg to Princess Victoria of Hesse and by Rhine.