Here you go, I've adjusted it for 11L and removed the DME addition that I used. You may want to plug it into some brewing software with the AA of the hops you have to hit the 45 IBU bitterness. I added a little black malt to darken it a bit more, but it's not really necessary. Chances are your efficiency will be different to mine (68%) but it's a good place to start so just crack on
Recipe Specs
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Batch Size (L): 11.0
Original Gravity (OG): 1.048 (°P): 11.9
Final Gravity (FG): 1.012 (°P): 3.1
Alcohol by Volume (ABV): 4.72 %
Colour (SRM): 32.6 (EBC): 64.1
Bitterness (IBU): 45.47 (Average)
Brewhouse Efficiency (%): 68
Boil Time (Minutes): 60
Grain Bill
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2.078 kg Maris Otter Malt (81.15%)
0.244 kg Flaked Barley (9.55%)
0.226 kg Roasted Barley (8.83%)
0.012 kg Black Malt (0.48%)
Hop Bill
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15.0 g Target Leaf (12.85% Alpha) @ 60 Minutes (Boil) (1.3 g/L)