Billionaire Emir buying Britain brick-by-brick

"Thank you for reminding me about Christie's," one of the world's richest monarchs, the Emir of Qatar, said casually on the eve of his state visit to Britain, which began yesterday with a spectacular horse-drawn carriage procession to Windsor Castle.

It is easy to forget about something as trivial as buying one of the world's top auction houses when you have an investment portfolio as big as that of Sheikh Hamad bin Khalifa al-Thani. The Qatari monarch, who owns one third of the world's natural gas reserves, is five times richer than the Queen. In recent times he has been using considerable quantities of that wealth to buy up trophy assets in London. Christie's – if he does decide to buy it – will be added to Harrods, the US embassy building in Grosvenor Square and the capital's most expensive property development, One Hyde Park in Knightsbridge. The Emir acquired the Chelsea Barracks site for a record-breaking price and also owns considerable chunks of Barclays, Sainsburys and Canary Wharf.

But if Sheikh Hamad is the most aggressive and adventurous buyer of British property, he is far from alone. Arabs, primarily from the Gulf states, have tripled their share of investment in UK commercial property in the past five years. Last year they spent £1.48 bn – representing 16 per cent of all foreign investment in the sector.