Two adjacent streets and 54 vape shops: How this eerily quiet suburb in Manchester became the vape capital of Europe, why locals are fed up of 'dodgy' users... and the very alarming hidden role of China

The billboards extend as far as the eye can see, each one a garish blend of bright colours and bold-type slogans. 'Big Puffs, Big Savings,' reads one. '40 Flavours of Nicotine Salts,' claims another.