Asda is overhauling its fish counters with a new three-step system of buying fish in a bid to boost sales and improve its quality credentials.

The service, launched in 302 stores March 12, lets consumers choose from 20 varieties of fish and a selection of 11 "Chosen by you" marinades, sauces, flavored butters and crumb toppings, reports The Grocer.

Shoppers can also choose to have the fish served in a microwave bag, oven bag or BBQ foil tray. The service will cost £4 (€4.8/$6.3)