I've seen several varying recipes for an OP clone and couldn't decide which one to use, so i've desgined my own to see how it compares.
Batch Size (L): 50.00
Total Grain (Kg): 11.70
Anticipated OG: 1.055
Anticipated EBC: 42.7
Anticipated IBU: 33.7
Brewhouse Efficiency: 75 %
Wort Boil Time: 75 Minutes
Grain
10.00 kg. Pale Malt(2-row) 1.038 5
0.70 kg. Crystal 55L 1.034 120
0.40 kg. Wheat Malt 1.038 3
0.40 kg. Black Patent Malt 1.027 1034
0.20 kg. Treacle 1.036 200
Hops
60.00 g. Fuggle 4.50 16.8 75 min.
30.00 g. Wye Challenger 8.00 14.9 75 min.
30.00 g. Goldings - E.K. 4.20 2.0 15 min.
Extras
10 gm Irish Moss Fining 15 Min.(boil)
Yeast Nottingham
Late hops and irish moss just gone in. Ran out of whirlfloc

I wonder if H&G have got a new batch in. Spoke to John at Derby and he was o/s and waiting for a delivery.