As Britain gets its first £1bn building, what price London's skyline?

It is 210 metres tall, houses 8,000 staff and has won awards for environmental efficiency. Now it's famous too. The head office of HSBC, one of two giant steel and glass boxes alongside the central tower at Canary Wharf in London, this week became the first building in Britain to be sold for more than £1bn.Nore..