Double Counting Planning Gains?

The County Council’s transport officers reassure us in The News that some £23.5 million from the developers of Northstowe will help to cover the costs of the Guided Bus. This would be done by making up the difference between the government subsidy of £92.5 million and the final £116 million price tag.

The same officers tell us that planning gains from new homes will help to make up the county’s compulsory 10% contribution towards a congestion charge/TIF bid – where central government is demanding some £40-47 million of locally found money out of a total bid of £517 million.

Can we have an assurance that there is no double-counting going on? Is there a map showing the zones where the developers’ revenue is being taken from to back up the assurances?