With just two days until the historic vote on Scottish independence, campaigners on both sides are doing everything they can to drum up crucial last-minute support. But when a trio of celebrities egged-on crowds at an anti-independence campaign in London, critics were quick to question their motives - as none of the three speakers was Scottish. Bob Geldof, Eddie Izzard and Al Murray pleaded with a packed Trafalgar Square last night to remain part of the 307-year-old union at a Let's Stay Together rally. Twitter users were quick to express their bemusement, however, with one saying of Irish-born Geldof's involvement: 'I thought it was impossible for my mind to be anymore set.' The campaign came as David Cameron flew to Aberdeen to beg Scots not to rip the United Kingdom apart, with opinion polls continuing to show the vote was far too close to call. Scroll down for video . Bob Geldof appeared at the Better Together rally in Trafalgar Square, London, to the bemusement of many critics . The musician was joined by comedian Eddie Izzard who sported a Union Jack manicure as he told Scots: 'We care' Comedian Al Murray told the crowds which had gathered in London that he liked Britain as it was 'vague' Mr Cameron appeared teary-eyed as he . issued his most emotional plea yet to voters ahead of Thursday's vote: . 'Please don't break this family apart.' Born in Ireland, Geldof said he had an 'immigrant's gratitude' to the union to which he owed 'everything'. ‘I . keep hearing that one of the main reasons we’re having this argument is . that the Scots are fed up with Westminster,' he told crowds. ‘I’d like to tell them we’re all f******* fed up of Westminster.’ He added: ‘If I was Scottish I’d say why not, but I’m Irish so I say why? No is not always negative. 'Before . there was a United States, before there was a United Nations, before . there was a united this, that and the other there was a United Kingdom . and it was an extraordinary meeting of very different minds of two . extremely close cousins. Lib Dem leader Nick Clegg shared this photograph on Twitter from the Better Together rally in Trafalgar Square . 'And . what a construct this thing is. Because Scotland is a feeling. England . is a feeling. Wales is a feeling, Ireland a feeling. 'But . the United Kingdom is one of the greatest ideas for the modern age. Between the native genius of the Scots and the pure pragmatic drive of . the English we made a world beater. 'The pity of this is that we are the closest of cousins – when one of our blood spills then it all spills.' Later he joined Michelle Mone and Brian Cox for a Newsnight referendum special. During the broadcast, he said: 'We need a new pact, but need to work that out together - not to go off in a huff.' Weighing in: Sir Bob Geldof pleaded with voters at the Let's Stay Together rally in Trafalgar Square . Presenter June Sarpong (left) joined the comedians alongside Scottish author Jenny Colgan (right) English actress Haydn Gwynne joined the group of celebrities sharing their views on independence . Some Twitter users were quick to criticise the trio's performance as none are in fact Scottish . Yemen-born Eddie Izzard took a softer . approach at the rally yesterday, saying: 'If you care, this is the time . to say it, to stand up, and if you care about the future of Scotland . this is your time to show it. 'This is our time to show Scotland that we care. Today’s the day and they’re going to vote on Thursday. 'To anyone in the United Kingdom the breaking up of the UK family is going to be a huge emotional wrench. 'It’s . for the Scottish people to decide, but I don’t know if they know how . much the rest if the UK cares, so that’s why I think it’s a great thing . to have at Trafalgar Square — otherwise how can they sense that?' Presenter Dan Snow wore a 'let's stay together' t-shirt as he answered questions alongside Izzard at the rally . Critics were quick to point out that neither Izzard, Geldof or Murray were born in Scotland . Thousands of people turned out at the National Gallery in Trafalgar Square this evening for the event . A woman dressed in a red suit with a Union Jack tie and 'I love Scotland' hat was among supporters . Meanwhile comedian Al Murray said what he liked most about Britain was that 'it's vague'. 'I like being British, it's so vague. The clue is in the name Brit-ish. We're ish'. Critics in the Yes camp took to Twitter to express confusion at the line-up of non-Scottish speakers, however. 'What is . Bob Geldof doing in Trafalgar Square? Is there anything this man won' get involved in?' one user wrote, while another said: 'You're missing . the point. This isn't about you.' Lib Dem leader Nick Clegg was in attendance, tweeting a picture from the crowd that he was 'proud' to be a part of. First Minister of Scotland Alex Salmond posed for selfies with Yes voters in Stirling yesterday . A woman takes a selfie with the SNP leader who admitted earlier this week he was taking a 'premature victory lap' With just two days to go, the SNP leader said he considered the 500,000 undecided voters 'deferred Yes-es' Elsewhere the debate seemed to take a lighter turn, as SNP leader Alex Salmond was spotted posing for selfies. The First Minister of Scotland took pictures with a handful of girls on the campaign trail in Stirling this afternoon, after yesterday admitting he considered the 500,000 undecided voters 'deferres Yes-es'. Meanwhile pranksters at Carter Bar near the Scottish border staged spoof-border control by planting signs demanding motorists produce their passports. Pranksters in Scotland put up mock border controls as the historic vote looms ever closer . You are now entering Scotland: A man at Carter Bay inspects a motorist's passport as part of the practical joke .
Celebrities weighed in on debate at Trafalgar Square in London yesterday .
Irish Bob Geldof said 'We're all f****** fed up' with Westminster .
Eddie Izzard, born in Yemen, said event helped show Scots England 'cares'
Al Murray from Buckinghamshire said likes Britain because 'it's vague'
Yes-voters quick to criticise trio and ask why they had become involved .
Later Geldof accused Yes campaigners of 'going off in a huff'
With just two days until the historic vote on Scottish independence, campaigners on both sides are doing everything they can to drum up crucial last-minute support. But when a trio of celebrities egged-on crowds at an anti-independence campaign in London, critics were quick to question their motives - as none of the three speakers was Scottish. Bob Geldof, Eddie Izzard and Al Murray pleaded with a packed Trafalgar Square last night to remain part of the 307-year-old union at a Let's Stay Together rally. Twitter users were quick to express their bemusement, however, with one saying of Irish-born Geldof's involvement: 'I thought it was impossible for my mind to be anymore set.' The campaign came as David Cameron flew to Aberdeen to beg Scots not to rip the United Kingdom apart, with opinion polls continuing to show the vote was far too close to call. Scroll down for video . Bob Geldof appeared at the Better Together rally in Trafalgar Square, London, to the bemusement of many critics . The musician was joined by comedian Eddie Izzard who sported a Union Jack manicure as he told Scots: 'We care' Comedian Al Murray told the crowds which had gathered in London that he liked Britain as it was 'vague' Mr Cameron appeared teary-eyed as he . issued his most emotional plea yet to voters ahead of Thursday's vote: . 'Please don't break this family apart.' Born in Ireland, Geldof said he had an 'immigrant's gratitude' to the union to which he owed 'everything'. ‘I . keep hearing that one of the main reasons we’re having this argument is . that the Scots are fed up with Westminster,' he told crowds. ‘I’d like to tell them we’re all f******* fed up of Westminster.’ He added: ‘If I was Scottish I’d say why not, but I’m Irish so I say why? No is not always negative. 'Before . there was a United States, before there was a United Nations, before . there was a united this, that and the other there was a United Kingdom . and it was an extraordinary meeting of very different minds of two . extremely close cousins. Lib Dem leader Nick Clegg shared this photograph on Twitter from the Better Together rally in Trafalgar Square . 'And . what a construct this thing is. Because Scotland is a feeling. England . is a feeling. Wales is a feeling, Ireland a feeling. 'But . the United Kingdom is one of the greatest ideas for the modern age. Between the native genius of the Scots and the pure pragmatic drive of . the English we made a world beater. 'The pity of this is that we are the closest of cousins – when one of our blood spills then it all spills.' Later he joined Michelle Mone and Brian Cox for a Newsnight referendum special. During the broadcast, he said: 'We need a new pact, but need to work that out together - not to go off in a huff.' Weighing in: Sir Bob Geldof pleaded with voters at the Let's Stay Together rally in Trafalgar Square . Presenter June Sarpong (left) joined the comedians alongside Scottish author Jenny Colgan (right) English actress Haydn Gwynne joined the group of celebrities sharing their views on independence . Some Twitter users were quick to criticise the trio's performance as none are in fact Scottish . Yemen-born Eddie Izzard took a softer . approach at the rally yesterday, saying: 'If you care, this is the time . to say it, to stand up, and if you care about the future of Scotland . this is your time to show it. 'This is our time to show Scotland that we care. Today’s the day and they’re going to vote on Thursday. 'To anyone in the United Kingdom the breaking up of the UK family is going to be a huge emotional wrench. 'It’s . for the Scottish people to decide, but I don’t know if they know how . much the rest if the UK cares, so that’s why I think it’s a great thing . to have at Trafalgar Square — otherwise how can they sense that?' Presenter Dan Snow wore a 'let's stay together' t-shirt as he answered questions alongside Izzard at the rally . Critics were quick to point out that neither Izzard, Geldof or Murray were born in Scotland . Thousands of people turned out at the National Gallery in Trafalgar Square this evening for the event . A woman dressed in a red suit with a Union Jack tie and 'I love Scotland' hat was among supporters . Meanwhile comedian Al Murray said what he liked most about Britain was that 'it's vague'. 'I like being British, it's so vague. The clue is in the name Brit-ish. We're ish'. Critics in the Yes camp took to Twitter to express confusion at the line-up of non-Scottish speakers, however. 'What is . Bob Geldof doing in Trafalgar Square? Is there anything this man won' get involved in?' one user wrote, while another said: 'You're missing . the point. This isn't about you.' Lib Dem leader Nick Clegg was in attendance, tweeting a picture from the crowd that he was 'proud' to be a part of. First Minister of Scotland Alex Salmond posed for selfies with Yes voters in Stirling yesterday . A woman takes a selfie with the SNP leader who admitted earlier this week he was taking a 'premature victory lap' With just two days to go, the SNP leader said he considered the 500,000 undecided voters 'deferred Yes-es' Elsewhere the debate seemed to take a lighter turn, as SNP leader Alex Salmond was spotted posing for selfies. The First Minister of Scotland took pictures with a handful of girls on the campaign trail in Stirling this afternoon, after yesterday admitting he considered the 500,000 undecided voters 'deferres Yes-es'. Meanwhile pranksters at Carter Bar near the Scottish border staged spoof-border control by planting signs demanding motorists produce their passports. Pranksters in Scotland put up mock border controls as the historic vote looms ever closer . You are now entering Scotland: A man at Carter Bay inspects a motorist's passport as part of the practical joke .
Scottish independence, campaigners on both sides anti-independence campaign in London, critics Eddie Izzard and Al Murray pleaded with a packed Geldof said he had an 'immigrant's gratitude' to up with Westminster,' he told crowds. ‘I’d like to tell them we’re all f******* fed up of to work that out together - not to go off in a huff.' Weighing in: Sir Bob Geldof pleaded with quick to criticise the trio's performance as none Trafalgar Square — otherwise how can they sense Murray were born in Scotland . Thousands of most about Britain was that 'it's vague'. 'I like