Supermarket chain said its sales have been boosted by the royal wedding.
Total sales excluding fuel during the 13 weeks to 1 May were up by 4.2 per cent from the same period a year ago, or by 2.5 per cent on a like-for-like basis.
The company said campaigns such as its "Fuel Britannia" and "Let's Celebrate" promotions for associated with the Royal Wedding helped to bring in extra customers.
Morrisons said in a statement: “The board is encouraged by the group's progress in the first quarter but with consumers' disposable incomes falling and an uncertain economic environment, we remain cautious.
“Our overall expectations for the full year remain unchanged.”