Mobile sector returns are low, particularly for smaller-scale operators, with H3G earning less than its cost of capital. Regulatory initiatives, spectrum auctions and 5G look set to worsen this picture as H3G strives to gain viable scale

Back-book pricing is crucial to the returns of fixed challengers. Regulatory intervention is likely to lead to a waterbed effect in the fixed sector and exacerbate challenges in mobile

New entrant business case in full fibre is limited to de facto monopoly opportunities. There is the potential for BT’s returns to increase markedly if it gets full fibre right but new entrants’ inferior economics are unlikely to offer sufficient investor appeal

Audiobooks are growing fast, driven by smartphone adoption and better supply, as well as interest from people who don’t usually buy books, such as young men

The sector is dominated by the presence of Audible, Amazon’s audiobook publisher/retailer, which has driven growth of audiobooks but put publishers under pressure. Its strategy is a lesson in Amazon’s approach to media

Audio is an opportunity to sell to new customers, but publishers must acquire and use rights responsibly, and experiment while not letting the audio tail wag the print dog

The decline in demand in print presents trading challenges, but the more immediate pressures are on the supply side, with a 15% rise in paper prices accentuating the burden of production and distribution costs

With digital advertising growing at stubbornly low rates, UK publishers need to return to their fundamental consumer-centred strengths by switching their strategic attention towards strong brands, curation, and community

The case for specialist, branded publishing media remains robust: products, services, and consumers are still best brought together in an authoritative, trusted media environment. Advertisers and agencies (and also media) have undervalued the effectiveness of those environments, and direct-to-consumer opportunities have been exaggerated by many brands

Spotify is now the world’s first publicly listed on-demand music streaming service. Its global footprint generated €4 billion in 2017 from over 70 million paying subscribers and 90 million ad-funded users across 65 countries

As it expands, the service is steadily but surely moving ever closer to profitability, with a 2019 operating profit a very real prospect

So far and for the near future, Spotify’s global pre-eminence versus competition from Apple, Amazon and Google proves remarkably resilient. Plans to build upon its differentiating features will become ever more decisive as the tech titans will continue to wield their resources and ecosystems against the comparatively undiversified company