Costa Coffee has been branded 'shameless' after one of its branches promised customers free drinks in return for leaving positive reviews.
A sign appeared on the counter of the Potters Bar outlet, in Hertfordshire, advertising customers can get 'any medium size drink for free' if they provide proof of a store rating of nine or 10 in a feedback email.
The sign read: 'Get your free coffee. If you receive an email saying "how was your visit at Costa?" Please give us the 9-10 rating there.
'Take the screenshot of that and bring back to us and you will get any medium size drink for free. Thank you in advance.'
It is unclear whether such reviews were for internal or external use, but Britain's largest barista chain is now under fire for seemingly violating consumer law.
