For the Government, it promised to be a spectacular way of galvanising public support for a major global summit on the issue of wartime sexual violence: projecting giant slogans onto the Big Ben clock tower and the Tate Modern.
But the Foreign Office’s ambitious plans had to be shelved because the people responsible for the use of the two London landmarks feared “opening the flood gates” to a host of other charities hoping to promote their causes, according to newly released documents.