The proportion of shops in Britain lying empty has hit a new record of 14.6% in February, according to figures compiled by the Local Data Company.
Vacancy rates had begun to stabilise at the end of 2011, but they have risen in January and February, the LDC said.
It is further evidence of a difficult start to the year for retailers.
Consumer confidence also slipped back in February, the latest survey from Nationwide indicated, largely due to concerns about employment prospects.
There was an increase in the number of respondents describing their economic situation as bad.
"Consumers also scaled back their expectations for the future, with the forward-looking aspects of the index weakening during the month," said Nationwide chief economist Robert Gardner.
However, he added that the number of consumers planning to buy household goods - an indicator of confidence - was higher in February than a year earlier. More...