I refer you to the Craig Murray quote posted earlier:
The UK and Swedish governments both participated fully, and at great expense to their taxpayers, in this UN process which is a mechanism that both recognise. States including Iran, Burma and Russia have released prisoners following determination by this UN panel, which consists not of politicians or diplomats but of some of the world’s most respected lawyers, who are not representing their national governments.
Countries who have ignored rulings by this UN panel are rare. No democracy has ever done so. Recent examples are Egypt and Uzbekistan. The UK is putting itself in pretty company.
It would be an act of extraordinary dereliction by the UK and Swedish governments to accept the authority of the tribunal, participate fully in the process, and then refuse to accept the outcome.