The SNO have referred themselves to the ICO after voters receive campaign letters addressed to other people.

The UK’s Information Commissioner’s Office (ICO) have confirmed that they are investigating a potential data breach by the Scottish National Party (SNP) after voters across Scotland received letters addressed to neighbours, or strangers.

The SNP referred themselves to the Commissioner on discovering the mailroom error in which tens of thousands of European election mailings to the wrong addresses. The ICO will investigate the breach under stricter EU data protection regulations, which carry significant penalties and/or fines for breaches.

Nicola Sturgeon, the SNP leader, signed the election letters in which she urged voters to back the party on 23 May.

A spokesman for the SNP acknowledged the letters had been sent in error, but played down the significance of the data breach, saying that the party had sent out 400,000 election letters, but do not yet know how many were affected, adding that the SNP wished to apologise to affected voters.