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

Mindful of the uncertain future effects of ongoing events, most notably the stagnating TV ad market and the costs of establishing an HQ in Leeds, Channel 4 returned a £5 million pre-tax surplus in 2018, which after investment in Box left its cash reserves at £180 million

Increased digital revenue more than made up for the anticipated drop in spot advertising and sponsorship (with group viewing share and SOCI down) while cautiousness necessitated lower content spend (down 5% from the peak in 2016); a concern given rising content costs

Nevertheless, Channel 4 is doing a good job delivering its remit in a tough environment, continuing to broadcast programming no-one else would and leveraging long-standing relationships to nurture television and film of a quality and ingenuity that belies the modest size of the organisation