In November 2025, Doncaster councillors voted to borrow £57 million towards the cost of reopening Doncaster Sheffield Airport. The viability of that borrowing rests on one figure: how many passengers the airport can attract each year.

The figure members were given was 2.5 million a year. The council's own later modelling shows 1.1 million by 2037. The Civil Aviation Authority's own ten-year forecast is 1.16 million. Three numbers, one decision, one airport. Only one of those numbers was in front of councillors on the night of the vote.

What the lease requires

The Superior Lease under which the airport will operate sets binding passenger thresholds. The airport must achieve an average of 1.3 million passengers a year across years three to five of the reopened operation. By years eight to ten, the figure rises to 2.3 million a year. If those thresholds are not met, the landlord holds the right to terminate the lease. The council, as tenant, carries the commercial loss.

The airport's previous operational peak, in 2019, was 1.4 million passengers a year. The 2.3 million figure required by the lease exceeds any volume the airport has ever achieved. The CAA forecast, of 1.16 million, sits below the lower threshold required in the first few years of operation.

Put the numbers side by side. The airport needs 2.3 million to keep its lease in the medium term. Its historical peak is 1.4 million. Its regulator's forecast is 1.16 million. Its own council's modelling is 1.1 million by 2037. And the figure on which the November 2025 borrowing was approved is 2.5 million.

What the independent assurance review found

The regional assurance process commissioned an independent review of the forecasts. The review's findings, so far as they have been reported, are that the existing passenger projections are overly optimistic; that the lower lease threshold of around 1 million passengers a year by 2031 is achievable under both base and high scenarios; and that the 2036 threshold of 2.3 million a year is met under neither.

That is not the view of a political opponent of the scheme. It is the view of the commercial advisers engaged through the regional assurance framework.

Airspace

The airport cannot operate at all until its airspace is restored. The airspace was removed in June 2025. Reinstatement requires a formal Civil Aviation Authority process. Independent advisers, including the regional reviewers and the Munich airport consultants engaged in the project, assess 2028 as the earliest realistic date for the resumption of commercial passenger flights. The council's stated position has been spring 2026, and subsequently 2027.

Every month of slippage in that reinstatement shortens the window in which the passenger thresholds have to be hit.

Homes in the flight path

Since the stage two planning application for the airport was submitted, the council has approved 1,400 homes in the flight path. Each of those homes is a potential future constraint on operating hours, noise tolerance, and route selection for carriers. The council is the planning authority for both the airport and the new housing. It has approved both.

The point

Elected members were asked to commit £57 million of public borrowing against a scheme whose commercial viability turns on passenger volumes neither the council's own modelling nor the regulator's forecast supports. These are not figures produced by opponents of the project. They are figures produced by the council and by the CAA. They came to light after the decision was taken.

A rescission motion has been filed. It does not cancel the airport. It returns the borrowing decision to the chamber that took it, with the numbers now available. If 2.5 million a year is the figure the scheme can hit, the vote will confirm that. If 1.1 million is the figure, that is for members to weigh on the evidence, not for officers to have decided, before the vote, that the evidence was better left out.