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

Broadcaster video on demand (BVOD) advertising is in demand with an £89m rise in 2018 spend to £391m, and is predicted to double within the next six years

The rise of on-demand viewing has created a scaled advertising proposition with a strong 16-34 profile – a relief for both broadcasters and advertisers, given the long-term decline in linear TV impacts for younger audiences

Big challenges remain: linear TV ad loads look excessive in on-demand, BVOD CPTs can be off-puttingly high, and measurement is still unresolved. BVOD is a welcome bright spot which faces online video competition head-on, but it won’t be able to turn broadcasters’ fortunes around alone