A COMPANY supplying a third of the fresh milk consumed in Britain warned it would increase the farm-gate price of its produce this winter.

Robert Wiseman, which has seven dairies across the UK, said it would raise the price to ensure the long-term supply of milk for its customers.

The supplier, which earlier this year signed a major deal with The Co-operative Group, has come under pressure from surging diesel and raw material costs.

The price warning comes as research from the British Retail Consortium showed a surge in food prices in June, piling more pressure on consumer spending power.

Robert Wiseman said trading for the 13 weeks to July 2 was in line with expectations.