Daniel Kretinsky: I can't make promises on Royal Mail stamp prices
![Daniel Kretinsky: I can't make promises on Royal Mail stamp prices](https://i.dailymail.co.uk/1s/2024/06/02/19/85623303-0-image-m-39_1717354682969.jpg)
The billionaire - nicknamed the 'Czech Sphinx' - has suggested costs could continue to spiral in coming years.
The billionaire - nicknamed the 'Czech Sphinx' - has suggested costs could continue to spiral in coming years.