Fashion underpins the growth of ecommerce; online took a 14% share of all fashion retail in the UK last year and is set to rise further, challenging the economics of physical retail 

Mobile is a key driver, it is changing research and shopping habits, and in turn affecting supplier product cycles, merchandising and marketing strategies 

Social media has disrupted the traditional shopping funnel, changing how trends and styles proliferate and shifting the sites of authority and influence in a £66 billion sector

Amazon’s marketing services bring in a growing stream of direct, high-margin revenue, but their main role is still in supporting vendor partnerships

Amazon uses customer profile data to profit from its own media and that of others, illustrating the value of a direct customer relationship in online advertising

In the future, Amazon’s moves into video content and voice interfaces are likely to significantly expand ad inventory, but maintaining the trust of shoppers is not straightforward

TalkTalk had a weak quarter, as was pre-warned, with the decline in the broadband base accelerating and consumer revenue growth of -6% slightly worse than the previous quarter

Guidance was however very bullish, with the company confident that it can bounce back to return to positive net adds in the March quarter, while still hitting its profitability guidance

This looks a difficult task in a market which is still highly competitive, but if it can achieve it, the longer term aim of a stable customer base and growing revenue and profits looks much more plausible

UK mobile service revenue growth improved in Q3 to -0.8% from -1.7% in the previous quarter, a welcome turnaround after three quarters of declining growth. Pricing remains firm, data volume growth remains robust, and some of the one-off factors affecting the previous quarter have dropped out

Sky Mobile soft-launched at the end of 2016, and it is taking an aggressive approach with a very deep MVNO technical model with substantial fixed costs, a high advertising budget and ambitious internal subscriber targets. To date the fixed MVNOs have not had a substantial impact on the MNOs, targeting a customer base that is non-core, but with SIM-only on the rise this may change

Looking at recently released network performance statistics, the impact of spectrum disparities is clear, with EE both able to offer faster speeds nationwide due to its large blocks of 4G spectrum, and offer much faster speeds in London. EE also has a lead in geographic coverage, and is planning to push its coverage much further, creating a challenge for the other operators to keep up

TalkTalk’s broadband subscriber decline has re-accelerated, with retail weaker than wholesale, and its consumer revenue is declining at 6%. This is partly due to price change timings, partly due to last year’s cyber-attack, but also partly due to underlying weak retail broadband subscriber growth

EBITDA did grow strongly, although this was in part due to less subscriber growth. The new pricing plans will likely drive more short term revenue weakness, but could potentially drive lower churn in the medium term, and they have renewed TalkTalk’s price competitiveness, particularly on high speed products

Longer term, we still think that the company will find it challenging to stabilise its retail broadband base in the face of a slowing market and Virgin Media’s network extension, at least without significantly upping its marketing spend and sacrificing some margin

UK residential communications market revenue growth accelerated to 5.8% in Q3, from 5.0% in the previous quarter, helped by an overlapping price rise at BT, and supported by firm pricing and accelerating high speed adoption elsewhere

In contrast, volume growth in the core three products continues to slow, with little sign that this will ever re-accelerate. In the longer term we cannot see ARPU growth acceleration continuing to fully compensate, and market revenue growth might also have peaked

With Virgin Media’s continuing network extension and improving pay TV service putting pressure on the other operators, Sky and TalkTalk are protecting themselves by aggressively marketing high speed broadband. Correspondingly, this quarter marks the first time that Openreach’s high speed net adds were mostly derived outside of BT’s retail divisions

As smartphone ownership nears saturation in almost all consumer groups, the base for the UK digital economy is widening: media consumption continues to move to connected devices and use of consumer services on mobile grows

Ecommerce is now responsible for 75% of retail growth, steady even during periods of decline for the overall market

Google and Facebook take up almost 90% of gross online advertising growth this year, and the ecommerce and mobile service markets show early signs of platform concentration

UK digital advertising has enjoyed strong growth in 2016, with forecast growth of 12.7% for the full year, just scraping under the £10 billion milestone

However, this growth is highly uneven, being led by mobile display and mobile search, while desktop spend looks set to decline by over 5% year-on-year. More significantly, 90% of the growth is accruing to the two big players: Facebook and Google

Cross-device campaigns, the convergence of marketing and advertising functions, and new consumption trends all threaten our traditional categorisations of online ad spend

Snap’s IPO is reportedly pressing ahead as expected, suggesting a remarkably early maturity for the company’s advertising business model

Snapchat creatively adapts the tried and true TV advertising formula, focusing on content, context and audience affinity – this goes against the grain of digital advertising and could unlock new brand budgets for online

After an IPO, Snap’s founders would have the freedom to expand their platform with new content, distribution channels and even devices

US entertainment groups have not been disrupted by the rise of digital media. Long running franchises drive growth across diverse sectors, starting with pay-TV and SVOD. US television advertising is rising in line with GDP, while the online video ad market is flourishing, with much appearing alongside the majors' scripted content

Studios' cable channels are their most profitable assets, but M&As with distribution platforms, including Comcast's aquisition of NBC Universal, have usually failed to deliver synergies

The Donald Trump presidency could leverage hostile public opinion towards mergers to undermine the AT&T bid for Time Warner; but it could also stimulate M&As if it granted tech companies a tax break to repatriate profits. A more protectionist administration could also bring about a less benevolent attitude towards majors' foreign operations