As Spotify wavers around the breakeven point, the deal with UMG is good news for royalty costs and thus for the likely advent of the IPO rumoured for autumn 2017

Royalty costs will reduce if Spotify reaches the subscriber growth targets that have been agreed – these have not been disclosed, so are hard to track

Question marks persist over whether a two-week optional windowing of new releases on the premium tier will significantly drive upgrades from the free tier

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

Streaming is now mainstream and we predict 113% growth in expenditure on subscriptions for 2015-18 in the top four markets (US, UK, Germany and France)

Free vs paid-for streaming is the central question for the music ecosystem: free yields fractions of pennies, making subscription the only credible business model

Market leader Spotify is facing competition from tech giants Amazon, Apple and Google, with deep pockets, for whom content is a pawn in a larger game