Boris Johnson has indicated that he could seek to renegotiate the UK"s extradition treaty with the United States, describing the current arrangement as "imbalanced". Amid mounting anger over the refusal of the US to extradite Anne Sacoolas over the death of Harry Dunn, the Prime Minister said it was an issue that was "certainly worth looking at." However, he insisted that questions over extradition were "totally different" to the Dunn case. It came as Jeremy Corbyn challenged Mr Johnson over the Government"s efforts to secure justice for the Dunn family, claiming that the "lopsided treaty means the US can request extradition in circumstances that Britain cannot." Responding Mr Johnson acknowledged that Mr Corbyn "has a point in his characterisation of our extradition arrangements with the United States." He added: "I do think there are elements of that relationship that are imbalanced. I certainly think it is worth looking at. "But it is totally different from the case of Harry Dunn and Anne Sacoolas and we continue to seek the extradition of Anne Sacoolas to face justice in this country."