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.

Expenditure on UK classifieds peaked in 2004, but has since almost halved to £1.95 billion in 2018. In every vertical, the print to digital transition of expenditure has favoured a first mover, leading to dominant positions that challengers find hard to disrupt.

The property market was stagnant in 2019, with stable house price growth but low transaction volumes as Brexit uncertainty held back sales. An expected cut in interest rates this year should contribute to a slight rise in transaction volumes.

The low tide of transactions has cemented the reign of Rightmove and condemned challengers to low traction. No. 2 player, Zoopla, plans for a major drive in 2020 after a 1.5-year investment spree by parent private equity firm Silver Lake Partners.