At the centre of this view from the top of the London Eye, 30 St Mary Axe (the Gherkin) needs no introduction. Leading down to the left of this are St. Helen's, 6-8 Bishopsgate (both dark), New Court (white) and the rectangular domed glass roof of the Walbrook Building in Cannon Street.
On the left of the picture from rear to front are Heron Tower, Tower 42, and the rather lower Stock Exchange Tower, with the dark shape of King's Reach Tower, Southwark in the foreground. The tower of the Royal Exchange is just to the right of the top of the last.
On the right of the picture is the concrete core of 20 Fenchurch Street, already dubbed the Walkie Talkie, and new since June 2011 (see TQ3280 : London Skyline from the London Eye
). The chimney of Tate Modern, and the towers of Cannon Street Station, are visible in front of this.
Breaching the skyline between the Gherkin and Fenchurch Street is the muliti-stepped Willis Building. In front of this some of the pipework of the Lloyd's Building is visible, but this is mostly obscured by the neo-Art-Deco curves of 20 Gracechurch Street.
In front of St Helen's and the Gherkin are cranes working on the site of the Leadenhall Building (the Cheesegrater), which will eventually obscure them from this viewpoint. There are also cranes on the site of Bishopsgate Tower (the Pinnacle) between New Court and King's Reach Tower, but work on this tallest project in the City is currently suspended.