Iran will begin to freeze part of its nuclear programme in return for the sanctions relief from January 20.
The deal, agreed between Iran and world powers after months of negotiation led by the EU's foreign policy chief Catherine Ashton, is hinged on Iran curbing its enrichment of uranium.
Officials have another six months from January 20 to agree a final settlement about the activity the West suspects is aimed at obtaining nuclear weapons capability.
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The former Wales international is expected to discover the new trial date at a hearing later today.
With dozens of stores making losses and 11,000 jobs at risk, BHS's main task is to return as much money as possible to creditors.
PM spokesman's comments come following reports that the EU is secretly drawing up plans for greater military cooperation across the EU.