The cost of chips could increase within weeks and there are fears of shortages due to this summer's heatwave, experts say.
Record temperatures, which saw parts of the UK reach 40 degrees, have caused the main potato crop to wilt. Farmers say potatoes are particularly vulnerable to heatwaves because they are 80% water.
The soaring temperatures were also experienced during the crop’s most important growing period. Earlier in August, Tom Bradshaw, from the NFU union, told trade magazine The Grocer that the water shortage was "critical".
