BRIEF-WPP CEO Sorrell On Board's Investigation Into Impropriety Says "I Reject The Allegation Unreservedly But Recognise That The Co Has To Investigate It" ‍​

April 3 (Reuters) -

* WPP CEO SORRELL ON BOARD’S INVESTIGATION INTO IMPROPRIETY SAYS “I REJECT THE ALLEGATION UNRESERVEDLY BUT RECOGNISE THAT THE CO HAS TO INVESTIGATE IT” ‍​

* WPP CEO SORRELL ON CO’S INVESTIGATION SAYS UNDERSTAND THAT PROCESS WILL BE COMPLETED SHORTLY, SHALL PLAY NO PART IN THE INVESTIGATION