Marina Heights / Limehouse (x 2 pics)

Built 1998, architects unknown, developer Bellway Homes. The sloping yellow roofs provide double-height sitting rooms to the penthouses. (You can just see Hawksmoore's St Anne's to the right.) Limehouse Basin, London Borough of Tower Hamlets. 

(Both pics CC BY-NC-SA 2.0 - credit: Images George Rex.)