Graham’s the family dairy will continue to supply all the milk for Scottish stores with Cornwall based Trewithen Dairies supplying a number of South West stores.
Muller had also supplied liquid milk to Aldi stores and will continue to supply other dairy categories including yoghurt and cream.
Julie Ashfield, managing director of buying at Aldi, said: “We have a long-standing relationship with Arla and are pleased to reach an agreement for them to become our main liquid milk supplier in England and Wales.
“This new agreement will enable us to work more closely with British dairy farmers to further enhance sustainability and animal welfare standards.”