Results were analysed using the Sequencing Analysis software (Applied Biosystems) and evaluated using the Sequencher software (Gene Codes Corporation) current version 4.5.
While President Obama wants to continue financing the corporation, the current budget turmoil has left its long-term fate uncertain.
Thomas, who wrote Cranford for BBC1, is also behind the corporation's current remake of Upstairs Downstairs.
The change is the latest manifestation of Hall's effort to bulk up the corporation's current affairs output.
The BBC will shoulder the cost of providing free television licences for people aged over 75 in a surprise deal that will cost it £750m by 2020, almost a fifth of the corporation's current annual income.
The BBC's Panorama is to scale back its investigative journalism and feature more analysis and familiar faces such as Fiona Bruce following criticism of the corporation's current affairs output and an exodus of senior staff.
As chairman of the BBC governors, the forerunner to the trust, Grade was the main architect of the corporation's current regulatory and governance body and was supposed to become its first chair in January 2007.
Greg Dyke, Thompson's predecessor as director-general, whose 2004 resignation over the BBC's Iraq coverage marked the start of the corporation's current turbulent phase, sums up the situation: "On-air, it's in pretty good shape.
A critical report by the BBC Trust earlier this year said the corporation's current affairs output, including Panorama, was failing to stand out and was being outgunned by Channel 4's Dispatches.
The overhaul was announced a month after the BBC Trust said the corporation's current affairs failed to stand out and often lagged behind Channel 4, which took all four nominations for the current affairs prize at this year's Bafta TV awards, won by Olly Lambert's acclaimed Dispatches investigation, Syria: Across the Lines.
