A senior Labour party official says leaks from a report on Russian interference in British politics raises serious questions about the security of next month’s election.

The Sunday Times says the report from Parliament’s intelligence committee concludes that Russian interference may have affected Britain’s 2016 Brexit referendum, though the impact was “unquantifiable.” The Times says the report discusses the impact of articles posted by Russian new sites that were widely disseminated on social media.

More Images
Scottish Liberal Democrat party leader Willie Rennie handles a golden eagle during a political campaign visit to Elite Falconry in Cluny, Kirkcaldy, Scotland, Saturday Nov. 16, 2019.  Britain's Brexit is one of the main issues for voters and political parties as the UK goes to the polls in a General Election on Dec. 12. (Andrew MilliganPA via AP)

A senior Labour party official says leaks from a report on Russian interference in British politics raises serious questions about the security of next month’s election.

Britain's Prime Minister Boris Johnson speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday.  A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene.  Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

She says if the Conservative leader does not, “people will rightly continue to ask: what is he trying to hide from the British public and why?”

Britain's Prime Minister Boris Johnson, left, views collected goods as he speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday.  A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene.  Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's Prime Minister Boris Johnson, left, views collected goods as he speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday. A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene. Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's Prime Minister Boris Johnson speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday.  A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene.  Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's Prime Minister Boris Johnson speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday. A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene. Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's main opposition Labour Party leader Jeremy Corbyn speaks to the media, in London, Saturday Nov. 16, 2019, following a Labour Party meeting to finalise the party manifesto for their policy ahead of the upcoming General Election. Britain's Brexit is one of the main issues for voters and political parties as the UK goes to the polls in a General Election on Dec. 12. (Dominc LipinskiPA via AP)

Britain's main opposition Labour Party leader Jeremy Corbyn speaks to the media, in London, Saturday Nov. 16, 2019, following a Labour Party meeting to finalise the party manifesto for their policy ahead of the upcoming General Election. Britain's Brexit is one of the main issues for voters and political parties as the UK goes to the polls in a General Election on Dec. 12. (Dominc LipinskiPA via AP)

Emily Thornberry, Labour’s foreign affairs spokeswoman, told the newspaper that Prime Minister Boris Johnson must “clear up the confusion, spin and speculation around this ISC report by publishing it in full at the earliest opportunity.”

Scottish Liberal Democrat party leader Willie Rennie handles a golden eagle during a political campaign visit to Elite Falconry in Cluny, Kirkcaldy, Scotland, Saturday Nov. 16, 2019.  Britain's Brexit is one of the main issues for voters and political parties as the UK goes to the polls in a General Election on Dec. 12. (Andrew MilliganPA via AP)

Scottish Liberal Democrat party leader Willie Rennie handles a golden eagle during a political campaign visit to Elite Falconry in Cluny, Kirkcaldy, Scotland, Saturday Nov. 16, 2019. Britain's Brexit is one of the main issues for voters and political parties as the UK goes to the polls in a General Election on Dec. 12. (Andrew MilliganPA via AP)

She says if the Conservative leader does not, “people will rightly continue to ask: what is he trying to hide from the British public and why?”

Britain's Prime Minister Boris Johnson speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday.  A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene.  Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's Prime Minister Boris Johnson speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday. A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene. Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's Prime Minister Boris Johnson, left, views collected goods as he speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday.  A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene.  Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's Prime Minister Boris Johnson, left, views collected goods as he speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday. A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene. Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's Prime Minister Boris Johnson speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday.  A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene.  Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's Prime Minister Boris Johnson speaks to staff and students at Bolton University, in Bolton, England, Saturday Nov. 16, 2019, in the aftermath of a major blaze which damaged a student residential building late Friday. A large fire broke out in a student accommodation block of flats known as The Cube late Friday, resulting in two people being treated at the scene. Visiting the scene, Johnson broke from his election campaign trail ahead of the Dec. 12 General Election. (Christopher Furlongpool via AP)

Britain's main opposition Labour Party leader Jeremy Corbyn speaks to the media, in London, Saturday Nov. 16, 2019, following a Labour Party meeting to finalise the party manifesto for their policy ahead of the upcoming General Election. Britain's Brexit is one of the main issues for voters and political parties as the UK goes to the polls in a General Election on Dec. 12. (Dominc LipinskiPA via AP)

Britain's main opposition Labour Party leader Jeremy Corbyn speaks to the media, in London, Saturday Nov. 16, 2019, following a Labour Party meeting to finalise the party manifesto for their policy ahead of the upcoming General Election. Britain's Brexit is one of the main issues for voters and political parties as the UK goes to the polls in a General Election on Dec. 12. (Dominc LipinskiPA via AP)