The old saying is that a diplomat is an honest man sent abroad to lie for his country. The point is that one is supposed to lie to the foreigners, not to the people back home, to them you must tell the truth. The Foreign Office seems to have forgotten this. The UK ambassador to Uzbekistan has effectively been fired for telling London some home truths:

News of Mr Murray’s latest confrontation coincided with the leaking of a classified memorandum he submitted to his superiors last July in which he railed against the government’s use of information extracted under torture in Uzbekistan.
“This material is useless, we are selling our souls for dross,” Mr Murray wrote. “Tortured dupes are forced to sign confessions showing what the Uzbek government wants the US and UK to believe – that they and we are fighting the same war against terror. We receive intelligence obtained under torture from the Uzbek Security Services, via the US. We should stop. This is morally, legally and practically wrong.”
The practice, he added, “fatally undermines our moral standing. It obviates my efforts to get the Uzbek government to stop torture; they are fully aware our intelligence community laps up the results.” The Foreign Office indicated that it would evaluate intelligence even if it had been extracted in other countries under torture.

Yes, the Foreign Office will win, Mr Murray will get fired without a pension, a predictable and dreary victory of the bureaucracy over the truth. What would you expect in modern Britain?