Lorraine Williamson
New agenda notes attributed to former PSOE militant Leire Díez have added further pressure to Spain’s governing party, as Moncloa denies any meeting between Díez and Prime Minister Pedro Sánchez.
The latest controversy centres on a 2025 agenda seized by the Guardia Civil’s UCO and included in the case being investigated by the Audiencia Nacional. Among the entries reported in Spanish media is a note reading “reunión con P.S.”, which Moncloa has strongly denied refers to any meeting with Sánchez. RTVE reported that government sources said Sánchez was in Brussels on the date of the note, attending an informal retreat of European Union leaders.
The case has become one of the most politically sensitive investigations in Spain, touching the PSOE, the Guardia Civil’s anti-corruption unit, senior party figures and several judicial cases linked to the wider political environment around the government.
Why this matters
The Leire Díez notes matter because they sit at the intersection of politics, policing and the courts.
Investigators are examining whether a network linked to Díez and other figures tried to obstruct, influence or discredit investigations affecting the PSOE and the government’s wider circle. At the same time, Moncloa and PSOE figures deny that Sánchez knew about, approved or was informed of Díez’s activities.
That tension makes the case politically explosive. It is not only about what appears in an agenda. It is about whether those notes support a wider theory of influence — or whether they are fragments without enough context to prove anything.
What appears in the agenda
The agenda, reportedly titled “Cantabria”, contains a series of references to politicians, ministers, judges, prosecutors, police units and ongoing investigations. RTVE and 20 Minutos both reported that the notebook includes phrases such as “Pedro no se fía del DAO”, “Marlaska y el SE están pillados por la UCO” and “reunión con PS”.
The initials and references are politically sensitive, but they do not all come with dates, context or explanation. That is important. An agenda entry can raise questions, but it does not, by itself, prove that a meeting took place or that a person mentioned was involved.
Moncloa has therefore moved quickly to deny any link between Sánchez and the “P.S.” note. Government sources told RTVE that the prime minister had never met Díez and had not known, backed or been informed of her activities.
Who is Leire Díez?
Leire Díez is a former PSOE militant who has been described in Spanish media as a party “fontanera”, a term often used in Spain for someone who operates behind the scenes to solve political problems or handle sensitive matters.
She has denied acting on behalf of the PSOE leadership and has presented some of her activity as journalistic or investigative work. However, Spanish investigators and several media reports have placed her at the centre of a wider inquiry into alleged attempts to obtain information about judges, prosecutors and Guardia Civil officers involved in politically sensitive cases.
The PSOE has publicly distanced itself from Díez. The party has said she was not acting on its behalf, while the investigation has continued to draw attention because of the names and institutions appearing in the case.
The UCO’s interpretation and Moncloa’s denial
One of the most controversial parts of the case is the UCO’s interpretation of references such as “el one”, which investigators have reportedly linked to Sánchez. That interpretation has become a major political flashpoint.
El País reported that the UCO has pointed to Sánchez as a possible beneficiary or person with knowledge of the alleged network, while also noting that the judge did not include the prime minister in the court order because of a lack of direct evidence.
Sánchez has denied being informed about Díez’s activities. In statements reported by RTVE, he said he neither approved nor had information about her actions, adding that he would never have tolerated them.
That leaves the public argument in a difficult place. The UCO has drawn inferences from messages, agenda notes and conversations. Moncloa says those inferences are wrong, unproven and politically damaging.
A wider investigation into alleged influence
The Leire Díez case is not limited to one agenda.
Cadena SER reported in May that Santos Cerdán, Gaspar Zarrías and the PSOE manager were among those investigated in an expanded part of the case over alleged payments and attempts to obstruct judicial processes affecting the party. The same reporting said the UCO went to the PSOE headquarters in Ferraz to request documentation, while sources cited by Cadena SER ruled out that the operation was about illegal party financing.
Separately, elDiario.es reported that investigators believe a group linked to Díez tried to undermine or disrupt cases affecting the PSOE and the government’s environment, while also seeking material about the so-called “policía patriótica” from the PP era. The same report said the inquiry has found signs of meetings, messages and alleged attempts to gather information about police, prosecutors and judicial proceedings.
These allegations remain part of an ongoing judicial process. The legal position of each person involved depends on the evidence accepted by the court, not on political interpretation or media pressure.
Why the Guardia Civil is now part of the political row
The case has also sharpened tensions between the government and the UCO, the Guardia Civil unit that investigates organised crime and corruption.
That tension matters because the UCO is involved in several highly sensitive cases. Any suggestion that political actors tried to influence, discredit or monitor investigators is serious. At the same time, government sources have criticised parts of the UCO’s interpretation, arguing that investigators are drawing conclusions that go beyond what the evidence proves.
This is why the story has become more than a corruption investigation. It is now also a dispute over institutional trust: between government, police investigators, courts, opposition parties and the public.
Opposition pressure rises
The case has given opposition parties a powerful line of attack against Sánchez and the PSOE.
The Partido Popular and Vox have already used the investigation to accuse the government of corruption and of trying to interfere with judicial or police work. For the opposition, the agenda entries and UCO reports reinforce the argument that the case reaches beyond one former party figure.
For the government, the opposite argument is central. Moncloa insists there is no evidence linking Sánchez to Díez’s activities and says the prime minister did not know, approve or tolerate them.
What is still unknown
Several important questions remain unanswered.
It is not yet clear what every agenda note means, who every set of initials refers to, or whether some entries reflect real meetings, speculation, reminders, rumours or claims made by others.
It is also unclear how much weight the court will give to the UCO’s interpretations. Police reports can shape an investigation, but judicial decisions depend on whether evidence is considered strong, direct and legally relevant.
That distinction is crucial in a case where names, initials and political implications are being debated in public before the courts have reached conclusions.
A damaging case, even before the courts decide
The Leire Díez notes have not produced a court finding against Sánchez. Moncloa denies any meeting or link between the prime minister and Díez, and the judicial process remains open.
Politically, however, the damage is already clear.
The PSOE is facing fresh scrutiny over how Díez operated, who she met, who paid for what, and whether senior party figures knew more than they have admitted. The UCO’s interpretations have intensified that pressure, while the government’s pushback has opened a second front over the role and conduct of police investigators.
For readers outside Spain’s daily political cycle, the key point is this: the case is not settled. But it is serious, fast-moving and increasingly central to the battle over trust in Spanish politics.