(Adds AGM vote)
LONDON, June 25 (Reuters) - Martin Sorrell's WPP,the world's largest advertising group, said trading had improvedin the last two months due to strong growth in the United Statesand Britain.
The firm said revenue on a like-for-like basis was up 7.6percent in the first five months of the year, compared with the7 percent rise recorded in the first three months.
In other positive news for the British company, shareholdersbacked its remuneration policy at the firm's annual generalmeeting, with 82 percent of investors who voted backing theplan.
That follows complaints in previous years over Sorrell'ssalary, which last year jumped to 30 million pounds ($50.9million), boosted by a performance-related scheme.
WPP, which has been outperforming its rivals in recentmonths in terms of organic growth, has been lifted by thecollapse of the planned merger between rivals Omnicom and Publicis, which has enabled Sorrell's firm topoach clients.
"Following the group's record year in 2013, 2014 has startedstronger and similar to the final quarter of 2013," it said.
Shares in the group were down 0.5 percent in midday trading. ($1 = 0.5892 British Pounds) (Reporting by Clare Hutchison and Kate Holton, editing by JamesDavey)