Consumer confidence reached its highest level in nine years during May and has soared over the last year.

Researcher Gfk’s Consumer Confidence Index recorded a three-point improvement during the month, bringing the measurement to zero after almost a decade in negative territory.

All measures, including people’s confidence in their personal financial situation and their attitude to big-ticket purchases, advanced over the month.

However, Gfk managing director of social research Nick Moon said that ā€œthe real driver of the increase is people’s assessment of the general economic climateā€.

He observed: ā€œA rise of three points in the index in a month is itself a significant change but what matters more, psychologically at least, is that the Index has left negative territory for the first time in over nine years.

ā€œIt is not actually positive but this is the first time it has reached zero since April 2005.ā€

Over the last 14 months since April 2013 the Index has risen a ā€œremarkableā€ 27 points– the biggest gain since June 1977.