The complex scrutiny highlights how the Met's £3.5billion budget will be squeezed by tighter controls on public spending over the next three years. Estimates for the financial year 2011/12 show an estimated shortfall of £132million, a sum which could increase significantly if savings are not made in the next few years. The report warns that if spending gets out of control the Met would have to consider capping growth and "changing the mix of police and other staff (reducing police numbers)".