Mr. Ottaway, in his letter, also asked for clarification of what relationship Mr. Heywood had with the British Consulate-General in Chongqing, where Mr. Heywood was found dead, or the British Embassy in Beijing.

WSJ: Lawmakers Press London On China Death

Mr. Hague said that more than a week after he was informed of the case and instructed officials to seek a probe, on Feb. 15, the deputy head of mission of the British Embassy in Beijing met officials from the consular department of the Chinese Ministry of Foreign Affairs to convey the message.

WSJ: U.K. Details Response to Heywood's Death