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

Mobile service revenue growth dipped this quarter but this was likely entirely due to the predictable (and predicted) impact of the abolition of EU roaming surcharges.  On an underlying basis, growth improved

BT/EE extended its lead in both service revenue and contract subscriber growth terms. EE’s substantial investments in network quality and customer service have driven returns to scale, and its multi-brand approach is working well

Contrasting with the returns to scale seen at EE, TalkTalk’s MVNO has suffered the reverse of this, unable to break-even despite peaking at just shy of 1 million customers, and deciding to retreat to an agency model.  Sky Mobile is performing respectably well in context, but may be headed for scale issues itself