WPP, the world's largest advertising group, reported a slight increase in like-for-like net sales growth in the first four months of 2017.

The company said it saw growth in all regions and businesses except North America and data investment management. 

The UK company, led by founder and CEO Martin Sorrell, reported a 0.7% rise in like-for-like net sales growth, compared to a rise of 0.8% in the first quarter. 

WPP, which had said it would cut Sorrell's pay to no more than £19m from £48m last year, saw about 92% of votes cast for the resolution to approve the compensation policy at its general meeting yesterday. 

Last year, excluding abstentions, 33.5% of investors in WPP had refused to back a £70m pay package for Sorrell at a fractious annual meeting, rebelling against one of the biggest payouts in British history. 

North America continued to be the weakest market for the company with like-for-like revenue down 2.7%and net sales down 1.6%.

The weakness in the pound helped the company's top line as it earns about 38% of its net sales revenue in North America. 

WPP had rattled investors in March when it cut its 2017 sales forecast, citing an ultra competitive environment in which rivals were having to fight for every dollar of advertising spending. 

Reported net sales rose 16.7% to £4.17 billion, WPP said in a statement ahead of its annual general meeting.