Heated Rear Windscreen Fuse

My heated rear windscreen is not working on my 2004 MG ZR. The Haynes manual is not very helpful and I cannot find which is the fuse and relay for this circuit. The fuse box in the cabin has a smaller bank of fuses on the left hand side of the main bank of fuses, but I can't find any reference to these anywhere. Can anybody help me to identify the fuse and relay locations please?

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