Writing in the Times last month, Architect Norman Foster relates how he was asked in a BBC documentary to name his favourite building. Without hesitation, he cited the now disappearing Jumbo 747. Six storeys high at the tail, with about 3000ft2 of space, five lavatories, three kitchens and room for 367 guests, he believes the 747 is genuinely architectural both in its design and its thinking. And, what’s more, it flies!