Right or wrong, the process could be tied up in litigation for years
No because Parliament is sovereign to the action either way; they have a debate and any MP in England who wants to get re-elected goes with the vote or they make this nonsense illegal and the courts throw it out. Either way it's a huge fail of the actual intent.
Also not for nothing but it's a constitutional issue and the power in law is held by the crown and loaned to the government vis-a-vis the prime minister. It's a fundamental misreading of UK constitutional law to think otherwise. This stuff isn't even difficult.
Non-natural persons don't get to decide the outcome of votes, natural persons do; the end. We operate a one person one vote system here, the very idea that a few (I'm guessing mostly foreign) corps can control the outcome is offensive to the very idea of democracy and must be stamped out with the maximum of force that the state can bring to bear.
It doesn't pass the laugh test and I can't imagine any court entertaining it for more than 5 minutes (courts AFAIK aren't allowed to control parliamentary business directly regardless) and ignoring all that they need to grow up anyway.