Company's time, company's laptop, company's idea submitted to the internal innovation platform.
It was rejected by the corporate immune system:
We are to inform you that your idea has been Backlogged.
What does this mean – backlogged? This means we believe your idea has promise but we are not ready to advance it ourselves or send it to another team without further development. We, the board, would like you to present to us in person once you have had a chance to refine your thoughts.
It's pretty good, I'd like to work on it in my free time.
Due to my redundancy, I will have some free time and I'd like to pursue it.
I've explainer to HR that it is important to me, that I would like to have ownership of my thoughts but did not get any reply in that matter, only time pressure to sign my agreement.
What is the default law position? Is their "backlogging" gives me any rights or do they still own everything?
EDIT / UPDATE: No trade secrets. Everything based on publicly available information. I just happened to be exposed to PR messages and I realized I can do it much better (beyond public relations).