Is it possible? Yes. Is it probable? That's another story. If you need to borrow, it might be difficult to find a lender. You'll also need to find a provider who'll be willing to facilitate the property purchase between two policies, which they may or may not. Also, you'd need to check if pension investment is allowed on your executive pension. I have a feeling IORPs now limits the amount of investment allowed on property.
Lastly, you'd have to remember that it's not a good investment strategy as you'd be throwing any notion of diversification out the window (not forgetting some vague articles online predicting WFH meaning a massive correction is about to happen in commercial property).