In a saucepan add the blackberries and blueberries together with the lemon juice, vanilla extract, honey and water. . Bring it to a simmer on low flame, cover with a lid and simmer together for a few minutes until the blueberries have popped. Allow to cool. Once cooled off strain the berry sauce separating the liquid from the solids.
Meanwhile using a mixer with the whisk attachment whip together the heavy cream with 1tbsp of the sugar. Transfer to the refrigerator and keep cold until ready to use.
In a different bowl cream together the egg yolks with 4tbsp of the sugar using the mixer with the whisk attachment. Start adding the mascarpone cheese a little bit at a time until incorporated.
Using a spatula add the chilled whipped cream to the bowl with the mascarpone and gently fold them together. Divide in two bowls.
Add the solid berries from the sauce to one of the bowls with the mascarpone and gently fold together. Set aside.
Dip the ladyfingers in the berry sauce and layer them in the bottom of the serving glasses or trifle dish. Add a layer of the berry mascarpone mixture followed by a layer of the plain mascarpone mixture. Repeat the layer until you run out of ingridients
Refrigerate for a couple of hours or until set.
Serve chilled garnished with some fresh blackberries, blueberries and fresh mint.