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BBC HD & 3D chief Danielle Nagler is leaving and will not be replaced.
Control of BBC HD will pass to BBC Two controller Janice Hadlow, while the person responsible for 3D has yet to be named.
Danielle Nagler joined the BBC in 1996 as a journalist and became head of BBC HD in July 2008, overseeing the launch of BBC One HD in 2010 and the recent 3D tennis trials at Wimbledon.
However, she also came in for criticism from campaigners who held her responsible for a decline in picture quality on the BBC's HD channels.
Control of BBC HD will pass to BBC Two controller Janice Hadlow, while the person responsible for 3D has yet to be named.
Danielle Nagler joined the BBC in 1996 as a journalist and became head of BBC HD in July 2008, overseeing the launch of BBC One HD in 2010 and the recent 3D tennis trials at Wimbledon.
However, she also came in for criticism from campaigners who held her responsible for a decline in picture quality on the BBC's HD channels.