Shadow foreign secretary Douglas Alexander has said Prime Minister David Cameron must "urgently consider reversing his decision" to attend the Commonwealth Heads of Government summit in Sri Lanka this week.
"For months Labour has urged the Government to do more to raise Britain's concern over human rights in Sri Lanka in the run up to the summit," Mr Alexander said.
"If the Prime Minister now chose to reverse his decision to attend the summit - even at this late stage - he would have Labour's full support."
Shadow foreign secretary Douglas Alexander has told Labour activists he "paid a price" for opposing former Brown aide Damian McBride's "destructive" style of politics.
Mr Alexander was hit by claims in the spin doctor's book that he ''dispassionately'' advised Gordon Brown that his sister would have to quit her role as the party's Scottish leader.
Wendy Alexander stood down from the post in 2008 following a row about donations to her leadership campaign.
Mr Alexander told the Progress rally: "What Damian McBride represented wasn't just the way politics is or just some briefing, it was destructive, divisive and deeply damaging to our party."
The political fallout from last week's Syria vote has continued with a Cabinet minister saying the results would be a matter for Ed Miliband's conscience and the shadow foreign secretary admitting he was not comfortable with the position Labour now finds itself in.
ITV News Political Editor Tom Bradby reports:
Michael Gove lambasted Labour saying that the party would have to live with the consequences.
Shadow foreign secretary Douglas Alexander told ITV News that he was not "comfortable with the situation" in Syria as the UK looks unlikely to intervene.
Speaking on BBC Breakfast Shadow foreign secretary Douglas Alexander said:
The shadow foreign secretary said the leaks that suggest the GCHQ had tapped data cables "underlines the need" for ministerial oversight of intelligence agencies.
Douglas Alexander said: "The latest reports in the Guardian underline the need for effective parliamentary and ministerial oversight of GCHQ and our other intelligence agencies.
"Whilst GCHQ do vital work to keep us all safe from harm, it is also vital that they do so with the legal framework set down by Parliament, and with proper safeguards in place to protect people's privacy.
"We urged the Intelligence and Security Committee (ISC) to look into these issues raised by the Guardian, and their work is now under way.
"These latest reports reinforce the urgency and importance of the ISC's work on this issue."
Labour’s Shadow Foreign Secretary Douglas Alexander has said there is unease "across party lines" about the Prime Minister's comments on the potential supply of British arms to Syria's opposition forces. In a statement, he said:
Labour's Shadow Foreign Secretary Douglas Alexander has accused David Cameron of losing control of his party over Europe.
It follows reports that the Conservatives are considering publishing a draft bill which would guarantee a referendum on Britain's membership of the EU.
"This seems to be just the latest panicked response from the Prime Minister who is now following, rather than leading his backbenchers" Mr Alexander said.
"David Cameron is a Prime Minister who has both lost control of the agenda and lost control of his party."
"Labour have said that we don't think committing now to an in/out referendum up to four years from now is in the national interest because the priority must be getting growth into the economy not getting Britain out of Europe."
Labour Shadow Foreign Secretary Douglas Alexander had this response to the Prime Minister's decision to publish a Bill for an EU referendum:
Labour's Shadow Foreign Secretary Douglas Alexander has said that the Prime Minister's comments on the EU, made on the BBC's Today programme, raise more questions than they answer: