I've just tried, and it looks a bit peculiar, too dry.
Never made Bara Brith before, but the mixture was really just dried fruit and flour. There was an egg in the recipe, and I did add a bit more milk to try and make it bind together, but didn't want to put loads in.
It's in the oven now, looking a bit dubious.
Should the mixture be really dry and crumbly before baking??