Gfk released its consumer confidence index for the U.K. on late Thursday evening. GfK's U.K. consumer confidence index fell to -3 in April from 0 in March, missing expectations for a decline to -1. It was the lowest level since December 2014.

All 5 measures fell in April.

"Mixed-messages about a post-Brexit world and the on-going Eurozone crisis are casting a cloud over our economy," Joe Staton, Head of Market Dynamics at GfK, said.

"Trends in confidence show our degree of optimism about the state of the economy and this indicator will make for interesting reading between now and the EU referendum on June 23^rd," he added.