The UK's Food Standards Agency is to review its advice on eating fish amid growing concern on the sustainability of stock and the environmental impact of fishing and fish farming.

The FSA's current nutritional advice recommends that consumers should be eating more fish and aiming for at least two portions a week, one of which should be oily. Yet pregnant women and those wanting a child are advised to eat no more than two portions a week.

Rosemary Hignett, head of the FSA's nutrition division said: "We are aware that fish consumption and sustainability is a key issue for many consumers and current advice can be confusing.

"We are going to involve interested stakeholders, including other Government departments, consumer and health groups, environmental organisations, as well as representatives of the fishing and food industries."

The results of the review are expected to be published by the end of the year.