Sales of products in Netto's Big Price Drop promotion have increased by 50% since the campaign launched two weeks ago, the discounter claims.

The 110 staple branded and own-branded items such as cereals, tea, coffee, yoghurt and baked beans, which offer an average discount of 11.6%, had helped attract new shoppers and increased the spend of existing ones, Netto said.

The discounter has now added a further 75 products to the promotion and has said it intends to make the deal a permanent fixture in its stores.

"We've worked hard with suppliers to beat our prices on a huge range of everyday staples to ensure our customers can see and feel the benefit of any falling raw ingredient costs," said Netto marketing manager Mike Hinchcliffe. "We're driving down costs for the long-term to offer even lower prices every day."