The partnership extends to All 4 and repeat shows on E4 and also includes new Big Bang Theory prequel series Young Sheldon.
Total revenue for ITV, Channel 4 and ITV Breakfast was up 2.4% in December to £188.7 million.
Following a poor October, November – with its Christmas advertising boost – saw a reversal of fortune for most of the UK TV market.
Howard’s End and Blue Planet II dominated on the BBC, while ITV secured solid ratings from international football friendlies.
October was a fairly poor month for most commercial broadcasters with a series of year-on-year revenue declines recorded.
Blue Planet II, Gunpowder and Our Girl all performed well in October’s TV ratings.
WARC’s data also reveals that TV drew 34.9% of global adspend last year.
Channel 4 suffered a -11.6% year-on-year drop in revenues in September, according to the latest agency estimates.
Strictly Come Dancing ruled the airwaves in September, as the fifteenth series returned to BBC One’s Saturday night autumn line-up.
Following a series of declines in June and July, August continued the trend in the commercial broadcast market.