I think you never stop learning.

Joseph Bazalgette created a sewer system which he originally sized for London's needs of the time - he then doubled it to anticipate the future beyond. These are the qualities that I admire.

I hope that any expansion of London will learn from the planning examples of some of its most desirable areas such as Chelsea, Notting Hill, Belgravia and Mayfair. All are characterised by high density and a generosity of green spaces.

I hope that any expansion of London will learn from the planning examples of some of its most desirable areas such as Chelsea, Notting Hill, Belgravia and Mayfair. All are characterised by high density and a generosity of green spaces. They are all pedestrian-friendly with shops, entertainment, restaurants and pubs within easy walking distance.

With the mission to Mars, the whole world wants to get involved. So we actually have 13 different space agencies from around the world working on the global exploration road map.

I love listening to music on holiday, and back in the old days, I used to travel with cassette tapes and a boombox.

Probably the first time I left Italy was to travel by train to Lourdes. I went with my mother and my grandmother - who was a very religious person - so it was a pilgrimage of sorts. I remember it as a very intense, but beautiful experience.

Schubert had arguably the same melodic gift as Mozart, but even less support. He didn't have the early exposure, never got to travel anywhere, and yet generated and amassed a body of work that grew and developed and is very profound.