The Duchess of Cambridge, as Patron of Action on Addiction, is visiting the charity's Hope House treatment centre in Clapham, south London.
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ITV News understands that Detective Sergeant Nick Bailey is close to being able to leave Salisbury District Hospital.
The blast happened on the road toward the Sakhi shrine where people gather to celebrate the New Year festival.
The retailer said it was "exploring" a company voluntary arrangement to help shore up its financial position.