The first major capital project funded by the Private Finance Initiative, the bridge has been controversial since its construction was announced. In exchange for the contractors funding the bridge's construction themselves (rather than being paid to do so from the public exchequer) they were granted a licence to operate the bridge and charge travellers tolls. When the contract was first awarded, the partnership estimated it would cost around £15 million, although delays and design changes added significantly to the cost (to around £25 million, by the BBC's estimate).