By Martin Lewis, June 24, 2010
Behind every budget there is a hidden hand.
In the case of Labour's last Chancellor Alistair Darling it was Gordon Brown who would keep officials up into the early hours of budget day fiddling with the numbers.
In new Chancellor George Osborne's very first budget - an action-packed affair in which almost all major taxes were adjusted - the hidden force was not at the Treasury at all.
Much of the thinking, if not the detail, which influenced Osborne's key decisions to tackle budget deficits and borrowing head on, was formulated on Threadneedle Street rather than Downing Street.