(ShareCast News) - Rexam's finance director David Robbie has been granted a leave of absence to undergo medical treatment and chemotherapy, having been recently diagnosed with a serious condition.Kath Kearny-Croft, director of group planning and finance, has been asked to take the role of acting finance director with immediate effect, the company said.Rexam said Robbie will continue to provide support to Kearny-Croft and the board in the preparation of the half-year results to be announced on 30 July and the board will review the need for an interim finance director in due course.Kearny-Croft has been with Rexam for eight years and was commercial and strategic planning director in the company's European sector before moving to the group's head office as director of group commercial finance in 2013.Prior to Rexam, Kearny-Croft worked for the BOC Group in the UK and the US for 10 years.At 14:41, Rexam shares were down 0.6% at 562.50p.