In the UK, carriage on Sky Q will give the new service the opportunity to prove its worth to viewers. Without integration with the UK's biggest pay-TV platform, growing scale is difficult for nascent DTC services.

Elsewhere in Europe, Discovery seeks to bundle too. Unlike the US, where the company has a single model—basic cable—in Europe it operates both free-to-air and pay channels, and it also owns Eurosport.

Ultimate success will come down to whether Discovery's "real life content" is essential and defensible. Generally there is little evidence of people taking services that are not broad, while the barriers to entry for competitors wishing to commission "real life content" are lower than other genres.

When we look back at consumer expenditure on pay-TV and alternative entertainment options during past economic downturns across major countries, we find a broad confirmation of the industry’s comparative resilience.

Also found are variations between services sold through annual contracts and cancel-anytime rivals, a negative impact on big-ticket products, and opportunities for substitutional services.

Unique features in the current crisis include the suspension of sport broadcasts and an SVOD-rich offering which widens consumer options. If hardship persists, incumbents like Sky could face tougher times than during the financial crisis.

Linear TV's decline continued into 2018, with an overall drop of 3% across the first 12 weeks YOY. However, overall TV set usage remained flat at 4 hours/day, as time spent on unmatched activities—which includes Netflix, Amazon and YouTube—continues to rise.

Within the ever-shrinking pie of consolidated viewing to the TV set, share of viewing (SOV) to the ten largest channels remains broadly flat. Across the whole of 2017 and the start of 2018 the best performer has been ITV (main channel).

Several big-name digital channels are showing surprising signs of recent decline, including UKTV’s Drama and Viacom’s 5USA. It is too early to tell if these declines are a blip or a trend. However, they reflect stalling growth from the long tail of digital channels in aggregate.