According to this SONY publicity...

" BBC Studioworks has today announced it has chosen Sony to deliver 4K over IP in its Television Centre studios at the newly refurbished White City site in Central London.

One of three new studios which will sit within a vibrant media-focused site, studio TC1 (10,800 sq ft), will be used by broadcasters and independent production companies to produce content ranging from sitcoms and entertainment shows to large live scale productions.

Some 22x Sony studio cameras, including 8x HDC-4300's 3x XVS switchers and more than 200 monitors, including OLED screens, were selected to give BBC Studioworks its 4K capability and help make its Television Centre facility the most up to date and flexible studio space in the UK. "