Here's a paragraph I originally missed about the export tariff (currently 3.1p)
"At the start of the scheme it was foreshadowed that changes to export tariffs would apply to all generators. However, existing tariffs are based on the assumption of the current level of the export tariff. An increase to the export tariff could therefore potentially provide a windfall gain to existing generators, who would continue to receive the benefit of a high generation tariff. We therefore propose that any change to the level of export tariffs would apply only to new entrants to the FITs scheme."
"At the start of the scheme it was foreshadowed that changes to export tariffs would apply to all generators. However, existing tariffs are based on the assumption of the current level of the export tariff. An increase to the export tariff could therefore potentially provide a windfall gain to existing generators, who would continue to receive the benefit of a high generation tariff. We therefore propose that any change to the level of export tariffs would apply only to new entrants to the FITs scheme."