The US wine giant Ernest & Julio Gallo is to launch its first ever bag-in-box wine, which will be available in three varietals from the Sierra Valley range - Cabernet Sauvignon, Chardonnay and White Grenache.

The wines will go on offer from mid July.

The Bag in Box market as a whole has shown strong growth in recent years , up 48% since 1997 and currently holding 8.3% of the total UK light wine market.

Edward Ward, marketing manager at Ernest & Julio Gallo said: "We've been delighted with the success of Sierra Valley since its launch in March. It's proved extremely popular with consumers, and is retaining its position as a firm favourite on people's shopping lists. Add to this the significant recent expansion of the Bag in Box market, and we're confident this extension of the range will be a great success. We look forward to all three premium Sierra Valley varietals being rolled out to other retail outlets."