Right i've had a play with all the above and some more and have come up with this.
Batch Size: 25.00 L
Boil Size: 32.42 L
Boil Time: 90 min
Brewhouse Efficiency: 75.00
Ingredients
4.30 kg Pale Malt, Maris Otter (5.9 EBC) Grain 80.07 %
0.45 kg Caramel/Crystal Malt - 80L (157.6 EBC) Grain 8.38 %
0.25 kg Roasted Barley (591.0 EBC) Grain 4.66 %
0.22 kg Barley, Flaked (3.3 EBC) Grain 4.10 %
0.15 kg Chocolate Malt (886.5 EBC) Grain 2.79 %
30.00 gm Goldings, East Kent [5.00 %] (90 min) Hops 16.0 IBU
30.00 gm Fuggles [4.50 %] (90 min) Hops 14.4 IBU
20.00 gm Goldings, East Kent [5.00 %] (30 min) Hops 7.7 IBU
450.00 gm Cocoa Powder Dark (Boil 0.0 min) Misc
Beer Profile
Est Original Gravity: 1.049 SG
Est Final Gravity: 1.013 SG
Estimated Alcohol by Vol: 4.75 %
Bitterness: 38.0 IBU Calories: 90 cal/l
Est Color: 51.0 EBC
Hopefuy it should taste chocolatey