"We see that 11 percent of European firms have reduced their UK workforce already, so uncertainty remains even if according to our figures it looks like the permanent (staffing) business has bottomed out," Chief Executive Alain Dehaze said in an interview after first-quarter results.

"Quarter after quarter there is a slight improvement. At some point companies have to hire again. You cannot freeze activities indefinitely."

Such an environment can benefit companies like Adecco Group that help employers find staff.

"On the one hand for sure it helps because companies tend to hire more temporary solutions to cope with the uncertainty. But at some point you can't wait indefinitely and you need to hire competitively and this is probably what we will see in the quarters to come. At least this will stabilise the decrease we had in the UK," he said.

Dehaze said wage inflation was likely to continue its recent pattern, with price pressure centred on the United States and Germany at around 2 to 4 percent.

He said Adecco Group planned no more significant acquisitions this year after last month buying U.S.-based technology education firm General Assembly.

(Reporting by Michael Shields)