Daniel Kretinsky could invest a maximum of £154m into West Ham if his latest claims about his investment plans are to be believed. The Czech billionaire, who is currently attempting to take over the Royal Mail in a controversial £3.5bn deal, owns 27 per cent of West Ham at present. Speculation that he could up his stake at the London Stadium has cooled in recent months, with most reports suggesting the 48-year-old is taking more of a backseat role. And recent comments in a rate TV interview tell us something about his limits in terms of a full Hammers takeover. READ MORE: Brazilian football ex…