John Lewis boss warns on Black Friday retail frenzy

John Lewis's managing director has warned that UK firms should not "stoke the fire" by encouraging heavy discounting on Black Friday.

The widely promoted sales day at the end of November brought the company its biggest trading week on record, with sales up 22% on last year.

However, Andy Street said the US-inspired phenomenon was "more challenging profitability-wise".

He told the BBC's Emma Simpson: "We've got to ask if it's right to concentrate trade so much in that one period".