The exact wording of the article is "
continuation or re-routing, under comparable transport conditions, to the final destination at a later date at the passenger’s convenience", without any mention of it needing to be reasonable.
However, I made that statement with the intent it be read as applying only until the next Lumo service was able to run. I personally wouldn't expect to be allowed to travel on an LNER service with a Lumo-only ticket at some distant point in the future on the strength of this regulation - but on the wording of the regulation alone there is perhaps an argument that doing exactly that would be permitted.
Your dutiful concern for your employer's revenue is noted regardless, though