David Lammy defends Chagos Islands deal amid criticism from Nigel Farage and doubts expressed by Mauritius Prime Minister Navin Ramgoolam. Lammy believes the deal is a good one that addresses US concerns about the military base on Diego Garcia. Farage argues that the deal poses a threat to US national security due to China's naval ambitions. The treaty's legal text is still being finalized and will be scrutinized by Parliament next year.