That's the word from Cambridge, where academics ran the numbers. Land registrations occur any time real estate changes hands.
[It seems its possible for] a simple surcharge on Land Registry transactions to make up any loss in direct revenues from making the Ordnance Survey's MasterMap, its most detailed map, available for free. The calculated benefits according to the study by Cambridge academics for the Treasury are dramatic: for a cost of between £12m and £30m in "lost" revenues from sales of its MasterMap and Large Scale Topo products, the wider economy would benefit by £168m.
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The Guardian
