Pre heat the oven to 200C gas 6.
Cut the brioche in 5 even slices horizontally.
Spread the clotted cream over 4 brioche slices evenly, leaving the top crust clean.
Layer up 2 slices with strawberries and spread liberally with jam.
Layer the other 2 slices with lemon curd, blueberries and lemon zest.
Stack up alternatly with strawberry and lemon curd slices then place the crust on top.
Then wrap tightly in foil.
Bake in a pre heated oven for 20 minutes.
Once cooked remove from the oven re press the foil, cool and chill well, best overnight.
Next day, remove from the fridge and take on your picnic.
Serve sliced with perhaps a little more clotted cream.