The latest statistics show that in the three months to September the UK economy grew by 0.7%.
Commenting, Liberal Democrat Chief Secretary to the Treasury, Danny Alexander said: "Our recovery is now well established and creating jobs in record numbers.
"These GDP figures show the UK economy has good momentum to deal with a less certain global outlook. Our plan is working and we need to stick to it.
"The families and businesses of Britain whose hard work is powering this recovery will judge harshly any Party that threatens to squander this progress.
"Britain can't forget the deficit or believe unfunded promises.
"Being sensible with the nation's money is the bedrock of the Liberal Democrat approach. We will keep a steady hand on the economic tiller because that is the only way to produce the stronger economy and fairer society that Britain needs."
Liberal Democrat Leader and Deputy Prime Minister, Nick Clegg said: "After many difficult decisions and with the hard work of people up and down the country, the British economy is doing well.
"Our economy is now larger than it was before the crash of 2008; over a million more private sector jobs have been created since 2010; and nearly 3 million people on low wages no longer pay any income tax on what they earn.
"As the economy continues to grow stronger, we are making sure that it does so in a society that is fairer."