Wed Sep 10, 2014 3:9PM GMT0
Cameron warned on Wednesday during a visit at the Scottish Widows building in Edinburgh that a breakaway from the UK would be forever.
In addition, Cameron warned that Britain would not share its currency, the pound, with an independent Scotland.
Earlier in the day, Cameron along with the Labour leader, Ed Miliband, and the Liberal Democrat leader and deputy prime minister, Nick Clegg, told voters at a separate rally in Scotland that they "desperately want...[Scotland] to stay.”
The visits by politicians from London is seen as a new panic in the British ruling elite, after a recent poll put pro-independence supporters in the lead for the first time with 51 percent compared to the 49 percent in favor of remaining in the union.
Some Scots believe the visits by Cameron and other politicians from London is taking place too late, with one independence supporter, James Curry, describing the events as “insulting and patronizing,” and adding, “They should've been up here ages ago. Instead, they're having a wee day trip, paid for by expenses."
Scotland will hold a national referendum on September 18 to determine the country’s future. The independence referendum could result in Scotland’s breakaway from the United Kingdom after more than 300 years of political union.
The Westminster has repeatedly warned against Scotland’s independence, saying it will jeopardize the UK’s stability and damage its international standing.
Scottish authorities, on the other hand, argue that independence from the UK would free Scotland from London’s austerity policies and unnecessary military spending.