Consensus Action on Salt and Health (CASH) has just published research on the salt levels in shop-bought sandwiches, following a survey of 140 sandwiches from popular retailers, and found that 41% of the sample contained 2g or more of salt per serving - a third of the adult daily limit.

The saltiest sandwich surveyed was Asda’s Extra Special Yorkshire Ham and Hawes Wensleydale, containing 3.9g of salt, over 60% of the recommended daily amount, followed by Pret A Manger’s All Day Breakfast sandwich with 3.54g of salt.

The sandwiches found to contain the least amount of salt were Tesco’s Healthy Living Chicken Salad and Co-op Healthy Living Tuna and Cucumber.