[4] Many of their early developments were financed by Jacob Rothschild's merchant bank Dawnay Day, who Ian said "proved very supportive".
[5] In 2005, in partnership with Claudio Del Vecchio, the President of the Retail Brand Alliance, he agreed to open Brooks Brothers stores in the United Kingdom.
[6] They redeveloped Marks & Spencer's former headquarters at 55 Baker Street, which now houses the offices of Knight Frank, the accountant BDO Stoy Hayward, and London & Regional itself.
[7] The previous plan for three towers had been approved by London mayor Boris Johnson but rejected by the British government in 2009.
[3] In the 2014 Sunday Times Rich List, together with his brother Richard, they have an estimated net worth of £2.6 billion.