They have also been linked with a move to US on-demand service Netflix.
Another, The Man in the High Castle, was recently adapted by Ridley Scott for US on-demand service, Amazon Prime.
Clarkson has been linked with a move to US on-demand service Netflix in recent weeks, and Wilman's departure will do nothing to dampen down that speculation.
ITV and rival US on-demand services Netflix, home to Kevin Spacey's House of Cards, and Amazon remain the frontrunners to sign Clarkson and his former colleagues.
Recently the US on-demand digital radio service Pandora won a court case against the American songwriters' collecting society Ascap, in which it claimed it couldn't afford to pay the society more than 1.85% of its revenue as it already pays record labels 49%.
Michaela Coel, star of the comedy Chewing Gum shown on Channel 4's E4, used her speech to "pay my respects" to comedian Victoria Wood, who died in April aged 62. US on-demand service Amazon Prime won a Bafta with its first nomination, Jill Solloway's transgender comedy, Transparent, which won the international award.
The corporation's then director of television, Danny Cohen, bemoaned last year that the BBC could not compete with the financial might of US on-demand rivals Netflix after it rebuffed the corporation's attempt to co-produce its royal epic, The Crown.
"For us, on-demand delivery services are another way we're supporting customers' ability to engage with us in a way that's most convenient for them," Walgreens Director of Mobile Innovation Joe Rago said in a statement.
CIRP bases this analysis on its quarterly surveys of US on-demand video customers.
Consumer Intelligence Research Partners CIRPP) released analysis of consumer behavior for US on-demand video services, including Netflix (NFLX), HBO (TWX), and Amazon (AMZN).
