The debate is continuing over plans to build a major new airport in the Thames Estuary. Today a new report says the cost and effort required to move waterbirds that use the estuary would run into millions of pounds. But airport supporters say it's got to be done.
David Johns reports, speaking to Labour Councillor Vince Maple from Medway Council, Paul Outhwaite from the RSPB, and Daniel Moylan, the Mayor of London's Aviation Adviser.
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