Researchers say lessons can be learned from cities such as Leeds which have experimented with later and staggered licensing hours, and which have a strong cluster of independent bars and clubs.

BBC: 'Flashy' bars upstage a pint and kebab

Adil knocked softly at Mohammed's door, then staggered off to bed to catch a few hours' sleep before the day's shoot, in just three hours time.

CNN: Preparing to cover The Hajj