These original guidelines, known as the RPG 3A Strategic Views Directions, protected 10 key ‘viewing corridors’ towards St Paul's Cathedral and the Palace of Westminster from places such as Greenwich and Primrose Hill.
Johnson said: ‘We are salami slicing the view of [heritage sites] and I want to protect them. I am not hostile to beautiful tall buildings – but they need to be in the right place.’
However some planning sources have questioned whether Johnson, a Conservative, will have the power to change Livingstone’s rules, which are underpinned by a Secretary of State direction – given by the current Labour government.
Meanwhile, the RIBA’s planning spokesman Peter Stewart played down the impact of the announcement. He said: ‘There were a few developers, on a few significant sites, who were delighted when Ken unveiled his view guidelines who will now be cross about what Boris is suggesting.
‘But it is pretty arcane stuff and I doubt it will affect too many sites.’