https://londonnewstime.com/the-rise-of-the-smashburger-how-us-craze-for-trendy-patties-costing-up-to-15-is-taking-over-british-high-streets-and-replacing-the-humble-burger-in-a-bun/718921/
The rise of the smashburger: How US craze for trendy patties costing up to £15 is taking over British high streets and replacing the humble burger in a bun