Supermarkets squeezed on prices by Spain’s deputy leader Yolanda Díaz  

Supermarkets in Spain are in the line of fire over inflation as the country’s deputy leader wages a campaign to press shops into cutting prices in an effort to help struggling families.

Yolanda Díaz, one of Spain’s deputy prime ministers and a contender for the top job, has intensified a political battle over living costs by pushing big supermarkets to offer an affordable “basket” of 20 to 30 staples.

Food and energy inflation…