Only one in three think they're saving enough for retirement

The rest feel their pension savings will be insufficient when they retire, a survey of people across 17 cities by the Prudential found.

On average, people living in a city estimate they will need an annual retirement income of £21,100 to feel comfortable, ranging from £26,400 for those in London to £17,900 for savers in Belfast.

Vince Smith-Hughes, a retirement income expert at Prudential, said: “While it is reassuring to see people being realistic about the money they’ll need to live on when they give up work, it is also worrying how many of them fear they haven’t saved enough to be comfortable.”

More than 2,200 people took part in the survey.

A spokesman for the Department of Work and Pensions said: “We want all people across the UK to be saving for their retirement, which is why anyone earning over £10,000 a year is automatically enrolled into a workplace pension and will benefit from employer contributions.”