Plans for a statue of Margaret Thatcher outside the Houses of Parliament have been blocked following concerns it does not have the blessing of her family and may be targeted by vandals.
Backers hoped the memorial to Britain's first female prime minister, reported to cost £300,000, would join the likes of Winston Churchill, Mahatma Gandhi and other political greats of history on Parliament Square.
However the Public Memorials Appeal Trust saw their application derailed after objections from the arms-length Government organisation that maintains the square and local campaigners.
Among the concerns was that the trust could not guarantee that Baroness Thatcher's family consented to the statue, which was to stand on a stone plinth on the western edge of Canning Green.
In a letter to City of Westminster council, The Royal Parks said it was objecting to the application on behalf of the Government as the trust "failed to give the assurances [we] sought".
On Thursday the Royal Parks added: "Numerous times we have requested assurances from the applicant that they have approval from the family for the statue. To date we have not had those assurances."
Meanwhile the former Tory leader's divisive legacy meant conservationists were worried her statue would be repeatedly targeted by those opposed to her politics.
In their response to the planning application, The Thorney Island Society (TIS) advised that the principle of leaving a 10-year gap between the death of a subject and the installation of a statue should be adhered to.
The group said: "While Lady Thatcher was also widely respected it cannot be said that she was uncontroversial in this country.
"There is a strong case for the 10-year rule to be respected - there should be a decent interval before permanent statues are erected, especially when they are controversial enough to risk vandalism."
In 2002 a protester decapitated a £150,000 Italian marble statue of Lady Thatcher on display at London's Guildhall Library.
There have also been cases of an existing resident of Parliament Square, Churchill, falling victim to vandals, including being defaced with graffiti.
The TIS said they were also dissatisfied with the quality of the design and its "understated and reverential character", saying it was "disappointing given that the Churchill statue is so much more interesting".
In a final slight the group said they understand "that Lady Thatcher's daughter dislikes the statue".
The design, by sculptor Douglas Jennings, is said to show the Iron Lady in a "resolute posture looking towards Parliament with a stern gaze".
Ivan Saxton, co-founder of the Public Memorials Appeal Trust, said in 2016 that there was "talk that (Carol) didn't like it because it isn't made of iron, but she doesn't mind that it's not made of iron - Carol's upset that there's no handbag".
At the unveiling of her statue outside the House of Commons chamber in 2007, Lady Thatcher commented: "I might have preferred iron but bronze will do."