Extract from LVMF: Thames side at Tate Modern 13B.1

Foreground and Middle Ground
235 Developers should seek to improve the townscape setting of the Cathedral, while working within the general geometric constraints of the St Paul’s Heights Limitations. The incorporation of unoccupied vertical features is encouraged on middle ground buildings, where these can be shown to improve the experience of the view without undermining the visibility of the Cathedral.

236 Visible City churches contribute to the townscape quality of views of the foreground and middle ground from this place. They should not be obscured by new development.

Background
237 Background development crowding in too close to St Paul’s Cathedral has already compromised views of the Cathedral and this condition should not be worsened. Development which visually interacts negatively with the peristyle, drum or dome will be refused.