I assembled this from a couple of forums
OLD HEN
4.50 kg Pale Malt, Maris Otter (3.0 SRM) Grain 87.38 %
0.30 kg Crystal Heritage (56.0 SRM) Grain 5.83 %
0.10 kg Carared (20.0 SRM) Grain 1.94 %
33.00 gm Challenger [7.50 %] (60 min) Hops 25.3 IBU
10.00 gm Challenger [7.50 %] (15 min) Hops 3.8 IBU
20.00 gm Goldings, East Kent [5.00 %] (15 min) Hops 5.1 IBU
30.00 gm Goldings, East Kent [5.00 %] (5 min) Hops 3.1 IBU
0.25 kg Sugar, Table (Sucrose) (1.0 SRM) Sugar 4.85 %
1 Pckgs Wyeast 1968 London ESB
Now, I didn't get the hop complexity I was hoping for and I put that down to no chilling. If using a cube, I would go:
10 mins: 15 Challenger, 20 EKG and no 15min addition at all
And put 30gm EKG direct into the cube and run the wort onto it.