Preheat the oven to 160°C / 350°F / Gas Mark 4.
Line a 25cm (10inch) springform pan with baking/parchment paper.
Cake batter: In a large mixing bowl, beat together the softened butter and sugar until light and fluffy.
Add the eggs, one at a time until just combined.
Now add the milk and vanilla.
Sift the flour, baking powder, salt, cinnamon into the egg mixture and combine together until you have a smooth, soft batter.
Pour the cake batter into the prepared baking pan and smooth the surface with a spatula or the back of a spoon.
Apples: Peel and cut the apples in half from the stalk down. Removing the apple core using an apple core remover.
Slice the apple halves into slices and push each half down 1cm (1/2 inch) into the top of the cake mixture, continue with the reaming apple halves.
Spoon over the honey. If the honey is too thick, heat it a little to make it runny and then spoon it over the cake mixture.
Baking: Bake in the preheated oven for 45 - 50 minutes.
Remove from the oven and leave to cool in the pan for 10 minutes.
After the time has passed remove the outer ring and leave to cool.
Serve warm or cold dusted with icing sugar.