Ministers have been accused of hiding the cost of a deal to hand the Chagos Islands back to Mauritius after questions were raised about how much the UK will pay to retain a strategically-important military base on the archipelago.
With revelations that Donald Trump is looking for a way to veto the deal struck by foreign secretary David Lammy because of concerns over the airbase on Diego Garcia island, the Labour government is facing calls to publish the costs to the taxpayer of the deal.
