Two senior salesman at Deutsche Börse in London have left the derivatives arm of German exchange operator Deutsche Börse, which is awaiting a review by European antitrust authorities on its proposed merger with NYSE Euronext.

Manuela Arbuckle, Eurex's London head of business development, and Christian Voigt, part of Deutsche Börse's executive business development team, are both leaving their posts this month, according to three sources familiar with the moves.