Asda has come under fire from campaigners for selling a dozen red roses for £2.

The flowers come from Kenya and Uganda but campaigners are concerned about the exploitation of workers and the environmental impact of importing flowers from more than 3,000 miles away.

However, speaking at a conference yesterday, international development secretary Hilary Benn argued flowers from Kenya were better for the environment than flowers from Europe because they are not grown in heated greenhouses.

“All our growers are members of ethical trading schemes which insist on good working conditions and pay. The growers are regularly audited and inspected,” a spokesman for Asda told the Daily Mail.