When is the last time an investor was held to the statements they made before they acquired a company? In the UK we actually have competition laws that stop lar

When is the last time an investor was held to the statements they made before they acquired a company? In the UK we actually have competition laws that stop large companies being sold if it would result in significantly layoffs or lack of competition. Senior execs in the purchasing company often have to speak to parliamentary committees. They routinely directly lie to parliament and no action is taken. What the investor says is worth nothing. They are buying a media company that would let them significantly influence in the market.