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Gregory Keith Davies, 74, was attacked at Port Philip Prison in Australia in July and is now in “extreme discomfort” after his skin was burned.

He was due to be in court later this month for a plea hearing and to be sentenced for the sick murder.

However, his defence lawyers have argued for an extension because of the scale of his injuries.

In May, Davies admitted to assaulting and killing Kylie in a suburb, north of Melbourne in Australia 33 years ago.