The agency said the operator was in the process of installing additional gas extraction measures and cladding to seal the site.

BBC: Work under way at Milton Keynes landfill to combat odour

The exchange operator goes through a rigorous process when studying potential new products, deciding on specifications, testing them, preparing systems, validating the interest from industry and traders, then preparing for the launch.

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Earlier this week, an e-mail dropped into my lap from Saudi Arabia's chief climate negotiator Mohammed Al-Sabban, a veteran of the process with a reputation for being a tough operator.

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Once a decision is made on the model, a tendering process would get underway to choose a private sector operator to run the airport on a day-to-day basis.

BBC: Cardiff airport

For more than a year, company execs have been discussing becoming a "mobile virtual network operator, " or MVNO, a model under which a company skips the expensive process of building a national phone network, instead signing on with an existing provider and rebranding its service.

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Ashland, in the process of refocusing its business on mining, made a deal to sell its interest to a small French operator.

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