Europe needs swagger

UK economy job done? No way: Osborne

The Brexit debate
The Brexit debate
I want UK to be exposed to the wider world: George Osborne
I want UK to be exposed to the wider world: George Osborne
Britain attracts huge amount of world’s investment: Fin MIn
Britain attracts huge amount of world’s investment: Fin MIn

The U.K. economy might be a bright spot among developed economies amid fears of a renewed global economic slowdown but there is still a long way to go to get it operating at full speed, according to U.K. Chancellor George Osborne.

"For the past few years the U.K. has now consistently been the fastest-growing of the major, advanced economies of the world…but I don't come here feeling it's a case of 'job done.' I always come to these meetings thinking, 'God, there's so much more we need to do'," Osborne told CNBC on the sidelines of the International Monetary Fund/World Bank annual summit in Peru at the weekend.

Expanding U.K. exports, building more infrastructure and improving productivity were among the items on his to-do list, although the country's positive economic momentum and low unemployment rate, of 5.5 percent, has eased the pressure on Osborne and the Conservative-led government under Prime Minister David Cameron.

UK Chancellor of the Exchequer George Osborne speaks at a Conservative Party Conference.
Paul Ellis I AFP | Getty Images

Read More Europe's crisis of confidence

Last week, the IMF raised its growth forecasts for the U.K. while slashing expectations for the global economy as a whole on the back of concern over emerging markets and China. It predicted U.K. growth of 2.5 percent in 2015, and 2.2 percent in 2016, revising its July forecast upwards. In fact, it highlighted the economy as a rare bright spot amid a gloomy global outlook.

"In the United Kingdom, continued steady growth is expected in 2015 and 2016," the IMF said in its World Economic Outlook report, "supported by lower oil prices and continued recovery in wage growth."

The IMF has not always looked so favorably on the U.K., however. In particular, Osborne's spending cut drive at the helm of the U.K.'s economy has drawn criticism from the IMF in the past although with its robust recovery, the government's strategy appears to have been vindicated.

Read MoreUK GDP revised up as disposable income jumps

"A couple of years ago, here at the IMF and in lots of other places, there was a debate raging as to whether the U.K. had pursued the right course of action in aggressively seeking to tackle its deficit…but you look at the results and the argument has been settled to take action and live within your means," Osborne remarked.

"I think Britain has shown that if you have a clear economic plan, if you're prepared to take difficult decisions to sort out your public finances and make your economy more competitive you see the benefits, not just in growth but in jobs created and higher living standards."

- By CNBC's Holly Ellyatt, follow her on Twitter @HollyEllyatt. Follow us on Twitter: @CNBCWorld