Watching traditional linear TV has shown a sharp decline among younger adults over the last two to three years and the question is how far it has to go before bottoming out. This report explores the causes and presents our forecasts up to 2020

We see the main causes of this as the growth of online connectivity associated with the proliferation of screens via smartphones and tablets, the increasing functionality of these other screens, the increasing population of connected TV sets and the growing volume of long and short form content that can be accessed over the internet

Examination of current “connectivity” trends suggests that 2013 will prove the peak year of decline. Thereafter we expect trends to stabilise over the next three or four years without fundamental change to the linear TV landscape

Explosive growth in take-up of smartphones and tablets means that the effective size of the internet will increase by several multiples within the next few years. This transformation in scale comes with a major change in character and operating dynamics, creating new opportunities and revenue streams.

Twitter is unique amongst social apps: it gives new users a blank canvas in which they can (and must) create their own social network reflecting their own interests, hence building an ‘Interest Graph’, but onboarding new users remains a challenge.

Revenue at Twitter is now on a $600 million annual run-rate, scaling rapidly since the introduction of ‘native ads’, and seems set for further growth: the key question is whether it can achieve breakout user growth and mass market scale.

Non-subscribers can download this report in full - alongside all our other coverage of the BBC during the Charter Review process - from the 'BBC Charter Review' page of our site.

The Charter Review of the BBC officially opened with the Culture, Media and Sport Committee’s inquiry into the Future of the BBC asking the question “What should the BBC be for and what should be the purpose of public service broadcasting?” The only obvious answer is that the BBC and public service broadcasting should be for the people of Britain, and the BBC rates highly on different measures of public and audience engagement. The BBC plays an irreplaceable role in the supply of PSB programming that UK audiences appreciate, most importantly news, where the BBC accounts for 70% of TV news time and for 22% of online news time in 2013.

Ofcom has been instructed by the UK government to charge the mobile operators ‘full market value’ for the 2G spectrum they have been using for many years, despite there being no liquid market for the spectrum

Ofcom’s general approach to such an imponderable question is eminently sensible, but we disagree with the detail of their methodology on three key aspects, which makes the current proposed charges over three times too high in our view, effectively charging the industry a one-off tax of £4.5bn

The elevated fee levels are (perhaps) still affordable on their own, but coupled with other recent regulatory decisions the UK is in danger of being seen as a hostile regulatory environment, with negative consequences for future investment levels

The stress on 21st Century Fox’s Italian pay-TV platform is easing as the worst recession of any G8 country is expected to end in 2014, and competitive pressure from Mediaset is weakening

Sky is sticking to a long term strategy, investing in the (unrivalled) quality of its offering and sustaining high recruitment costs. The subscriber base seems to have levelled off, revenues are stable, but profits have collapsed. Management plans cost cuts to raise profitability by 2016

The upcoming auction for the 2015-18 football rights could see Sky gaining more exclusivity at a higher cost, which it would have to recoup mostly by rising prices. The key potential upside resides in an Italian economic upturn – which is only conceivable in a few years

Richard Desmond’s appointment of Barclays to explore the sale of the Channel 5 Group in 2013 has fuelled speculation over prospective purchasers should Northern & Shell be intent on selling this asset

The reported target of at least £700 million, seven times the £103.5 million paid by Northern & Shell to RTL three years ago, reflects a strong performance in 2013, but needs to be against several distinctive factors, including Channel 5’s near total reliance on advertising and the cross-promotional benefits it gains from the Northern & Shell print publications

Regulatory and strategic considerations suggest that neither ITV nor the pay-TV platform operators, Sky and BT, are likely to emerge as serious bidders and that an overseas group from the US is the most likely outcome if a sale is to take place

On 29 November, the Leveson Inquiry into the culture, practices and ethics of the press finally issued its report. Its verdicts on the conduct of the press, politicians and police were less severe than expected.

The three main political parties have accepted most of the report’s recommendations, but have disagreed over the use of statute. As expected, the Conservatives are against, while Labour and the Lib Dems are in favour.

Subsequent cross-party talks and negotiations between editors have so far failed to produce agreement, with the process only becoming more opaque as time goes on. The shape of the future regulatory system remains uncertain.

Smartphones and tablets running iOS and Android will outsell PCs by more than 2:1 in 2012. There will be 1bn of these devices in use by the end of the year, compared to around 1.5-1.6bn

PCs The hardware business continues to polarise, with Samsung and Apple dominating revenue and revenue growth and most other branded manufactures looking distinctly sub-scale. Samsung and Apple are using their scale to cement their position

Though Apple and Android now dominate the smart devices market, it remains subject to massive uncertainty at every level, with almost all sectors and companies facing major, often existential challenges in the next year

UK mobile service revenue growth nudged down in Q3 2012 by 2.0ppts to -3.8%, with 0.5ppts driven by an increase in the effect of regulated MTR cuts and 1.5ppts caused by underlying factors, largely driven by a weakening UK economy

In October EE launched its new brand and 4G service to great fanfare. The response of the other operators has been very mixed; Vodafone has indicated that it will launch a better 4G network next year, H3G has emphasised the merits of its 3G network, and O2 has not focused on networks at all. We continue to believe that EE’s 4G products will be good for its ARPU but not necessarily raw subscriber numbers, with the rebrand exercise bringing additional synergy benefits to its bottom line

The overall outlook is looking tough for the next six months, with consumer confidence still low and unlimited tariffs hitting pricing, but more promising thereafter, as the 4G premium becomes more material, and the regulated MTR cuts finally start to moderate in Q2 2013

European mobile market service revenue growth dropped again in Q3, by 1.9ppts to -6.2%. This was not helped by a substantial increase in the MTR impact, driven by a big cut in Italy, but underlying revenue growth still fell by 1.3ppts In stark contrast to Europe, the US mobile market continues to grow apace, with there being over 10ppts between the growth rates of the two regions. The most obvious difference between the markets is the very much higher levels of capex spent by the US incumbents, which drives their superior network quality and coverage, and hence price premia, and hence superior growth The European incumbents have not (yet) used their greater ability to spend on capex to increase the spending gap with smaller operators, with 4G launches (mostly) being low profile with low initial coverage (the UK being a notable exception to this). While this is an understandable approach given the prevailing macroeconomic conditions, it does mean that closing the growth gap with the US remains a distant prospect