Newly disclosed documents reveal that the Foreign Office advised against British military intervention to remove the then Zimbabwean president, the long-serving leader, in 2004, advising it was not considered a "serious option".
Policy papers from Tony Blair's government indicate officials considered options on how best to handle the "remarkably robust" 80-year-old dictator, who refused to step down as the country descended into violence and economic chaos.
Faced with the ruling party winning a 2005 election, and a year after the UK participated in a US-led coalition to overthrow Iraqi leader Saddam Hussein, Downing Street asked the Foreign Office in July 2004 to develop potential courses of action.
Officials agreed that the UK's policy of isolating Mugabe and building an international consensus for change was not working, having failed to secure support from key African nations, notably the then South African president, Thabo Mbeki.
Options outlined in the documents were:
"Our experience shows from Afghanistan, Iraq and Yugoslavia that altering a government and/or its bad policies is almost impossible from the outside."
The diplomatic assessment dismissed military action as not a "realistic option," adding that "The only candidate for leading such a armed intervention is the UK. No one else (even the US) would be prepared to do so".
It cautioned that military intervention would result in heavy casualties and have "considerable implications" for UK nationals in Zimbabwe.
"Short of a severe human and political catastrophe – resulting in widespread bloodshed, large-scale refugee flows, and instability in the region – we assess that no nation in Africa would agree to any attempts to remove Mugabe forcibly."
The paper continues: "We also believe that any other international ally (including the US) would sanction or join military intervention. And there would be no legal grounds for doing so, without an authorising Security Council Resolution, which we would not get."
Blair's foreign policy adviser, Laurie Lee, advised Blair that Zimbabwe "will be a real spoiler" to his plan to use the UK's presidency of the G8 to make 2005 "a pivotal year for Africa". The adviser stated that as military action had been discounted, "it is likely necessary that we must play the longer game" and re-engage with Mugabe.
Blair seemed to concur, writing: "We should work out a way of revealing the lies and malpractice of Mugabe and Zanu-PF ahead of this election and then afterwards, we could try to re-engage on the basis of a firm agreement."
The departing ambassador, in his valedictory telegram, had advocated critical re-engagement with Mugabe, though he recognized the Prime Minister "would likely be appalled given all that Mugabe has said and done".
The Zimbabwean leader was ultimately removed in a military takeover in 2017, aged 93. Earlier assertions that in the early 2000s Blair had tried to pressure Thabo Mbeki into joining a military coalition to depose Mugabe were strongly denied by the former UK premier.
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