From Peyton & Byrne: British Baking by Oliver Peyton (Square Peg, 2011)
Recipe available here
As I am beginning to realise, the cake recipes from this book tend to take longer than anticipated to make. I have to admit, having started this one late on a weekend afternoon, I was tempted to omit the white chocolate icing out of sheer laziness, but that would have been a mistake as it really adds an extra dimension to an already deliciously moist bake.
Despite the warning against over-swirling, I sadly over-swirled, giving a rather subtle marble effect.
Having learnt my marbling lesson, I will definitely be attempting this one again with a few less swirls.