LONDON — With new U.K. tax relief for high-end TV and animation approved by the European Commission last week, London mayor Boris Johnson has announced £2 million ($3 million) in new investment in film and media agency Film London.

“We are at the dawn of a golden age of TV production in London,” said Johnson, speaking Thursday at the capital’s Ealing Studios. “We have an unprecedented opportunity to grow this exciting sector to deliver jobs, produce more world class British drama and, above all, make London the city of choice for TV and animation production. Let’s make sure that all future ‘Downtons’ are filmed on our turf.”

Ealing is home to Julian Fellowes’ “Downton Abbey” and Andy Serkis and Jonathan Cavendish’s performance-capture studio The Imaginarium (pictured above).

Film London is charged with bringing in $303.3 million of extra production expenditure from TV and animation and creating 1,000 new industry jobs in the capital. The investment includes $1.14 million to promote the development of the TV and animation sectors.

London is already the third busiest city for film production in the world, behind L.A. and New York, attracting major Hollywood productions recently including “Fast and Furious 6,” “All You Need is Kill,” “Jack Ryan” and “Maleficent.”

Warner Bros. opened its Leavesden Studios last year while Marvel Studios, which based “Captain America: The First Avenger” and the upcoming “Thor: The Dark World” in London, is in pre-production on “Guardians of the Galaxy” and will base the second “Avengers” film at Shepperton Studios.

The city is home to approximately 75% of the U.K. industry. Film London generated $1.17 billion in production investment over the past four years and has been collaborating with the mayor’s office since 2003 to boost jobs, support U.K. talent and attract high-end productions to the capital.

“Having worked with the mayor’s office for the last 10 years to transform the capital into a film friendly city, we now welcome the same task for high-end TV and animation,” said Adrian Wootton, CEO of Film London and the British Film Commission.

Filming volume in London grew 21% in 2012 with 17,604 filming days, making it the busiest year on record for production in the capital. Features accounted for 1,778 filming days, up 42% on 2011. The film tax credit is estimated to have provided $227.5 million between 2010 and 2011 to support London’s film industry. The new high-end TV and animation tax relief came into effect April 1. High-end TV dramas with U.K. budget spends exceeding $1.5 million per hour will be able to claim relief on up to 25%.