The Civil Guard launched another corruption operation on Wednesday morning in Madrid, arresting the former Popular Party (PP) First Minister of the region, Ignacio González, who governed from 2012-2015, along with 11 others.

The investigation, into what has now become a standard range of fraud charges, is related to the publicly owned company Canal de Isabel II de Madrid, which is responsible for water management in the Spanish capital and the surrounding region.

It centres on allegations the company purchased South American companies at above-market prices while Mr. González was Firs...