Daniel Křetínský, who is bidding £3.75bn for the business, has hinted at ‘incentive scheme’ for workers if successful

The union representing postal workers has called for them to be handed a serious stake in Royal Mail, after the Czech billionaire bidding to snap up its owner for £3.6bn floated the possibility of implementing an “incentive scheme” if he is successful.

Daniel Křetínský’s EP Group published an offer document on Wednesday laying out the details of its bid for Royal Mail’s parent company, International Distributions Services (IDS).