Amazon has responded to a leaked memo about plans to track union activity among workers by saying it is happy for its staff to join labour organisations.
The memo, viewed by website Recode and not disputed by Amazon, discusses plans for a system that would analyse data on unions alongside other threats to the company such as weather and crime.
Last month Amazon advertised for two intelligence analysts to report on union activity, among other duties.
It later withdrew the adverts.
In a statement to the BBC, Amazon said: “We respect our employees’ right to join, form or not to join a labour union or other lawful organisation of their own selection, without fear of retaliation, intimidation or harassment.
“Across Amazon, including in our fulfilment centres, we place enormous value on having